Method and apparatus for determining resource in nr v2x

ABSTRACT

Provided are a method for performing wireless communication by a first device, and an apparatus for supporting same. The method may comprise: receiving, from a base station, information related to a time offset of a sidelink (SL) resource and information related to a first period of the SL resource; determining a number of slots belonging to a resource pool within 10240 ms; obtaining information related to a second period in a logical slot unit, from the information related to the first period based on the number of slots belonging to the resource pool; and determining a time domain of the SL resource based on the information related to the second period, the information related to the time offset, and the number of slots belonging to the resource pool.

CROSS-REFERENCE TO RELATED APPLICATIONS

Pursuant to 35 U.S.C. § 119 (a), this application claims the benefit ofKorean Application No. 10-2020-0131966, filed on Oct. 13, 2020, thecontents of which are all hereby incorporated by reference herein intheir entirety.

BACKGROUND OF THE DISCLOSURE Field of the Disclosure

This disclosure relates to a wireless communication system.

Related Art

Sidelink (SL) communication is a communication scheme in which a directlink is established between User Equipments (UEs) and the UEs exchangevoice and data directly with each other without intervention of anevolved Node B (eNB). SL communication is under consideration as asolution to the overhead of an eNB caused by rapidly increasing datatraffic. Vehicle-to-everything (V2X) refers to a communicationtechnology through which a vehicle exchanges information with anothervehicle, a pedestrian, an object having an infrastructure (or infra)established therein, and so on. The V2X may be divided into 4 types,such as vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I),vehicle-to-network (V2N), and vehicle-to-pedestrian (V2P). The V2Xcommunication may be provided via a PC5 interface and/or Uu interface.

Meanwhile, as a wider range of communication devices require largercommunication capacities, the need for mobile broadband communicationthat is more enhanced than the existing Radio Access Technology (RAT) isrising. Accordingly, discussions are made on services and user equipment(UE) that are sensitive to reliability and latency. And, a nextgeneration radio access technology that is based on the enhanced mobilebroadband communication, massive Machine Type Communication (MTC),Ultra-Reliable and Low Latency Communication (URLLC), and so on, may bereferred to as a new radio access technology (RAT) or new radio (NR).Herein, the NR may also support vehicle-to-everything (V2X)communication.

FIG. 1 is a drawing for describing V2X communication based on NR,compared to V2X communication based on RAT used before NR. Theembodiment of FIG. 1 may be combined with various embodiments of thepresent disclosure.

Regarding V2X communication, a scheme of providing a safety service,based on a V2X message such as Basic Safety Message (BSM), CooperativeAwareness Message (CAM), and Decentralized Environmental NotificationMessage (DENM) is focused in the discussion on the RAT used before theNR. The V2X message may include position information, dynamicinformation, attribute information, or the like. For example, a UE maytransmit a periodic message type CAM and/or an event triggered messagetype DENM to another UE.

Thereafter, regarding V2X communication, various V2X scenarios areproposed in NR. For example, the various V2X scenarios may includevehicle platooning, advanced driving, extended sensors, remote driving,or the like.

SUMMARY OF THE DISCLOSURE Technical Objects

Meanwhile, if the UE receives information related to CG resource(s), aunit of a slot to which a time offset, a period, etc. is applied (e.g.,a unit of a logical slot or a unit of a physical slot) needs to beclearly defined. Furthermore, if the UE determines the location of CGresource(s) by performing a modular operation for a value obtained basedon the time offset, the period, etc., a value used for the modularoperation needs to be defined. If the above is not defined, adiscrepancy may occur between SL resource(s) used by the UE which hasreceived the information related to the CG resource(s) and SLresource(s) allocated by the base station to the UE, which may beundesirable in terms of radio resource management and quality assuranceof SL communication.

Technical Solutions

In one embodiment, provided is a method for performing wirelesscommunication by a first device. The method may comprise: receiving,from a base station, information related to a time offset of a sidelink(SL) resource and information related to a first period of the SLresource; determining a number of slots belonging to a resource poolwithin 10240 ms; obtaining information related to a second period in alogical slot unit, from the information related to the first periodbased on the number of slots belonging to the resource pool; anddetermining a time domain of the SL resource based on the informationrelated to the second period, the information related to the timeoffset, and the number of slots belonging to the resource pool.

In one embodiment, provided is a first device configured to performwireless communication. The first device may comprise: one or morememories storing instructions; one or more transceivers; and one or moreprocessors connected to the one or more memories and the one or moretransceivers. The one or more processors may execute the instructionsto: receive, from a base station, information related to a time offsetof a sidelink (SL) resource and information related to a first period ofthe SL resource; determine a number of slots belonging to a resourcepool within 10240 ms; obtain information related to a second period in alogical slot unit, from the information related to the first periodbased on the number of slots belonging to the resource pool; anddetermine a time domain of the SL resource based on the informationrelated to the second period, the information related to the timeoffset, and the number of slots belonging to the resource pool.

Effects of the Disclosure

The user equipment (UE) can efficiently perform SL communication.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a drawing for describing V2X communication based on NR,compared to V2X communication based on RAT used before NR.

FIG. 2 shows a structure of an NR system, based on an embodiment of thepresent disclosure.

FIG. 3 shows a radio protocol architecture, based on an embodiment ofthe present disclosure.

FIG. 4 shows a structure of a radio frame of an NR, based on anembodiment of the present disclosure.

FIG. 5 shows a structure of a slot of an NR frame, based on anembodiment of the present disclosure.

FIG. 6 shows an example of a BWP, based on an embodiment of the presentdisclosure.

FIG. 7 shows a UE performing V2X or SL communication, based on anembodiment of the present disclosure.

FIG. 8 shows a procedure of performing V2X or SL communication by a UEbased on a transmission mode, based on an embodiment of the presentdisclosure.

FIG. 9 shows three cast types, based on an embodiment of the presentdisclosure.

FIG. 10 shows an example of CG type-1 resource(s), based on anembodiment of the present disclosure.

FIG. 11 shows an example of CG type-2 resource(s), based on anembodiment of the present disclosure.

FIG. 12 shows a procedure for a UE to determine SL resource(s) based oninformation related to a CG configuration, based on an embodiment of thepresent disclosure.

FIG. 13 shows a method for a first device to perform wirelesscommunication, based on an embodiment of the present disclosure.

FIG. 14 shows a method for a base station to perform wirelesscommunication, based on an embodiment of the present disclosure.

FIG. 15 shows a communication system 1, based on an embodiment of thepresent disclosure.

FIG. 16 shows wireless devices, based on an embodiment of the presentdisclosure.

FIG. 17 shows a signal process circuit for a transmission signal, basedon an embodiment of the present disclosure.

FIG. 18 shows another example of a wireless device, based on anembodiment of the present disclosure.

FIG. 19 shows a hand-held device, based on an embodiment of the presentdisclosure.

FIG. 20 shows a vehicle or an autonomous vehicle, based on an embodimentof the present disclosure.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

In the present specification, “A or B” may mean “only A”, “only B” or“both A and B.” In other words, in the present specification, “A or B”may be interpreted as “A and/or B”. For example, in the presentspecification, “A, B, or C” may mean “only A”, “only B”, “only C”, or“any combination of A, B, C”.

A slash (/) or comma used in the present specification may mean“and/or”. For example, “A/B” may mean “A and/or B”. Accordingly, “A/B”may mean “only A”, “only B”, or “both A and B”. For example, “A, B, C”may mean “A, B, or C”.

In the present specification, “at least one of A and B” may mean “onlyA”, “only B”, or “both A and B”. In addition, in the presentspecification, the expression “at least one of A or B” or “at least oneof A and/or B” may be interpreted as “at least one of A and B”.

In addition, in the present specification, “at least one of A, B, and C”may mean “only A”, “only B”, “only C”, or “any combination of A, B, andC”. In addition, “at least one of A, B, or C” or “at least one of A, B,and/or C” may mean “at least one of A, B, and C”.

In addition, a parenthesis used in the present specification may mean“for example”. Specifically, when indicated as “control information(PDCCH)”, it may mean that “PDCCH” is proposed as an example of the“control information”. In other words, the “control information” of thepresent specification is not limited to “PDCCH”, and “PDCCH” may beproposed as an example of the “control information”. In addition, whenindicated as “control information (i.e., PDCCH)”, it may also mean that“PDCCH” is proposed as an example of the “control information”.

A technical feature described individually in one figure in the presentspecification may be individually implemented, or may be simultaneouslyimplemented.

The technology described below may be used in various wirelesscommunication systems such as code division multiple access (CDMA),frequency division multiple access (FDMA), time division multiple access(TDMA), orthogonal frequency division multiple access (OFDMA), singlecarrier frequency division multiple access (SC-FDMA), and so on. TheCDMA may be implemented with a radio technology, such as universalterrestrial radio access (UTRA) or CDMA-2000. The TDMA may beimplemented with a radio technology, such as global system for mobilecommunications (GSM)/general packet ratio service (GPRS)/enhanced datarate for GSM evolution (EDGE). The OFDMA may be implemented with a radiotechnology, such as institute of electrical and electronics engineers(IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, evolved UTRA(E-UTRA), and so on. IEEE 802.16m is an evolved version of IEEE 802.16eand provides backward compatibility with a system based on the IEEE802.16e. The UTRA is part of a universal mobile telecommunication system(UMTS). 3rd generation partnership project (3GPP) long term evolution(LTE) is part of an evolved UMTS (E-UMTS) using the E-UTRA. The 3GPP LTEuses the OFDMA in a downlink and uses the SC-FDMA in an uplink.LTE-advanced (LTE-A) is an evolution of the LTE.

5G NR is a successive technology of LTE-A corresponding to a newClean-slate type mobile communication system having the characteristicsof high performance, low latency, high availability, and so on. 5G NRmay use resources of all spectrum available for usage including lowfrequency bands of less than 1 GHz, middle frequency bands ranging from1 GHz to 10 GHz, high frequency (millimeter waves) of 24 GHz or more,and so on.

For clarity in the description, the following description will mostlyfocus on LTE-A or 5G NR. However, technical features according to anembodiment of the present disclosure will not be limited only to this.

FIG. 2 shows a structure of an NR system, based on an embodiment of thepresent disclosure. The embodiment of FIG. 2 may be combined withvarious embodiments of the present disclosure.

Referring to FIG. 2, a next generation—radio access network (NG-RAN) mayinclude a BS 20 providing a UE 10 with a user plane and control planeprotocol termination. For example, the BS 20 may include a nextgeneration-Node B (gNB) and/or an evolved-NodeB (eNB). For example, theUE 10 may be fixed or mobile and may be referred to as other terms, suchas a mobile station (MS), a user terminal (UT), a subscriber station(SS), a mobile terminal (MT), wireless device, and so on. For example,the BS may be referred to as a fixed station which communicates with theUE 10 and may be referred to as other terms, such as a base transceiversystem (BTS), an access point (AP), and so on.

The embodiment of FIG. 2 exemplifies a case where only the gNB isincluded. The BSs 20 may be connected to one another via Xn interface.The BS 20 may be connected to one another via 5th generation (5G) corenetwork (5GC) and NG interface. More specifically, the BSs 20 may beconnected to an access and mobility management function (AMF) 30 viaNG-C interface, and may be connected to a user plane function (UPF) 30via NG-U interface.

Layers of a radio interface protocol between the UE and the network canbe classified into a first layer (layer 1, L1), a second layer (layer 2,L2), and a third layer (layer 3, L3) based on the lower three layers ofthe open system interconnection (OSI) model that is well-known in thecommunication system. Among them, a physical (PHY) layer belonging tothe first layer provides an information transfer service by using aphysical channel, and a radio resource control (RRC) layer belonging tothe third layer serves to control a radio resource between the UE andthe network. For this, the RRC layer exchanges an RRC message betweenthe UE and the BS.

FIG. 3 shows a radio protocol architecture, based on an embodiment ofthe present disclosure. The embodiment of FIG. 3 may be combined withvarious embodiments of the present disclosure. Specifically, (a) of FIG.3 shows a radio protocol stack of a user plane for Uu communication, and(b) of FIG. 3 shows a radio protocol stack of a control plane for Uucommunication. (c) of FIG. 3 shows a radio protocol stack of a userplane for SL communication, and (d) of FIG. 3 shows a radio protocolstack of a control plane for SL communication.

Referring to FIG. 3, a physical layer provides an upper layer with aninformation transfer service through a physical channel. The physicallayer is connected to a medium access control (MAC) layer which is anupper layer of the physical layer through a transport channel. Data istransferred between the MAC layer and the physical layer through thetransport channel. The transport channel is classified according to howand with what characteristics data is transmitted through a radiointerface.

Between different physical layers, i.e., a physical layer of atransmitter and a physical layer of a receiver, data are transferredthrough the physical channel. The physical channel is modulated using anorthogonal frequency division multiplexing (OFDM) scheme, and utilizestime and frequency as a radio resource.

The MAC layer provides services to a radio link control (RLC) layer,which is a higher layer of the MAC layer, via a logical channel. The MAClayer provides a function of mapping multiple logical channels tomultiple transport channels. The MAC layer also provides a function oflogical channel multiplexing by mapping multiple logical channels to asingle transport channel. The MAC layer provides data transfer servicesover logical channels.

The RLC layer performs concatenation, segmentation, and reassembly ofRadio Link Control Service Data Unit (RLC SDU). In order to ensurediverse quality of service (QoS) required by a radio bearer (RB), theRLC layer provides three types of operation modes, i.e., a transparentmode (TM), an unacknowledged mode (UM), and an acknowledged mode (AM).An AM RLC provides error correction through an automatic repeat request(ARQ).

A radio resource control (RRC) layer is defined only in the controlplane. The RRC layer serves to control the logical channel, thetransport channel, and the physical channel in association withconfiguration, reconfiguration and release of RBs. The RB is a logicalpath provided by the first layer (i.e., the physical layer or the PHYlayer) and the second layer (i.e., a MAC layer, an RLC layer, a packetdata convergence protocol (PDCP) layer, and a service data adaptationprotocol (SDAP) layer) for data delivery between the UE and the network.

Functions of a packet data convergence protocol (PDCP) layer in the userplane include user data delivery, header compression, and ciphering.Functions of a PDCP layer in the control plane include control-planedata delivery and ciphering/integrity protection.

A service data adaptation protocol (SDAP) layer is defined only in auser plane. The SDAP layer performs mapping between a Quality of Service(QoS) flow and a data radio bearer (DRB) and QoS flow ID (QFI) markingin both DL and UL packets.

The configuration of the RB implies a process for specifying a radioprotocol layer and channel properties to provide a particular serviceand for determining respective detailed parameters and operations. TheRB can be classified into two types, i.e., a signaling RB (SRB) and adata RB (DRB). The SRB is used as a path for transmitting an RRC messagein the control plane. The DRB is used as a path for transmitting userdata in the user plane.

When an RRC connection is established between an RRC layer of the UE andan RRC layer of the E-UTRAN, the UE is in an RRC_CONNECTED state, and,otherwise, the UE may be in an RRC_IDLE state. In case of the NR, anRRC_INACTIVE state is additionally defined, and a UE being in theRRC_INACTIVE state may maintain its connection with a core networkwhereas its connection with the BS is released.

Data is transmitted from the network to the UE through a downlinktransport channel. Examples of the downlink transport channel include abroadcast channel (BCH) for transmitting system information and adownlink-shared channel (SCH) for transmitting user traffic or controlmessages. Traffic of downlink multicast or broadcast services or thecontrol messages can be transmitted on the downlink-SCH or an additionaldownlink multicast channel (MCH). Data is transmitted from the UE to thenetwork through an uplink transport channel. Examples of the uplinktransport channel include a random access channel (RACH) fortransmitting an initial control message and an uplink SCH fortransmitting user traffic or control messages.

Examples of logical channels belonging to a higher channel of thetransport channel and mapped onto the transport channels include abroadcast channel (BCCH), a paging control channel (PCCH), a commoncontrol channel (CCCH), a multicast control channel (MCCH), a multicasttraffic channel (MTCH), etc.

FIG. 4 shows a structure of a radio frame of an NR, based on anembodiment of the present disclosure. The embodiment of FIG. 4 may becombined with various embodiments of the present disclosure.

Referring to FIG. 4, in the NR, a radio frame may be used for performinguplink and downlink transmission. A radio frame has a length of 10 msand may be defined to be configured of two half-frames (HFs). Ahalf-frame may include five 1 ms subframes (SFs). A subframe (SF) may bedivided into one or more slots, and the number of slots within asubframe may be determined based on subcarrier spacing (SCS). Each slotmay include 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).

In case of using a normal CP, each slot may include 14 symbols. In caseof using an extended CP, each slot may include 12 symbols. Herein, asymbol may include an OFDM symbol (or CP-OFDM symbol) and a SingleCarrier-FDMA (SC-FDMA) symbol (or Discrete Fourier Transform-spread-OFDM(DFT-s-OFDM) symbol).

Table 1 shown below represents an example of a number of symbols perslot (N^(slot) _(symb)), a number slots per frame (N^(frame,u) _(slot)),and a number of slots per subframe (N^(subframe,u) _(slot)) based on anSCS configuration (u), in a case where a normal CP is used.

TABLE 1 SCS (15*2^(u)) N^(slot) _(symb) N^(frame, u) _(slot)N^(subframe, u) _(slot) 15 KHz (u = 0) 14 10 1 30 KHz (u = 1) 14 20 2 60KHz (u = 2) 14 40 4 120 KHz (u = 3) 14 80 8 240 KHz (u = 4) 14 160 16

Table 2 shows an example of a number of symbols per slot, a number ofslots per frame, and a number of slots per subframe based on the SCS, ina case where an extended CP is used.

TABLE 2 SCS (15*2^(u)) N^(slot) _(symb) N^(frame, u) _(slot)N^(subframe, u) _(slot) 60 KHz (u = 2) 12 40 4

In an NR system, OFDM(A) numerologies (e.g., SCS, CP length, and so on)between multiple cells being integrate to one UE may be differentlyconfigured. Accordingly, a (absolute time) duration (or section) of atime resource (e.g., subframe, slot or TTI) (collectively referred to asa time unit (TU) for simplicity) being configured of the same number ofsymbols may be differently configured in the integrated cells.

In the NR, multiple numerologies or SCSs for supporting diverse 5Gservices may be supported. For example, in case an SCS is 15 kHz, a widearea of the conventional cellular bands may be supported, and, in casean SCS is 30 kHz/60 kHz a dense-urban, lower latency, wider carrierbandwidth may be supported. In case the SCS is 60 kHz or higher, abandwidth that is greater than 24.25 GHz may be used in order toovercome phase noise.

An NR frequency band may be defined as two different types of frequencyranges. The two different types of frequency ranges may be FR1 and FR2.The values of the frequency ranges may be changed (or varied), and, forexample, the two different types of frequency ranges may be as shownbelow in Table 3. Among the frequency ranges that are used in an NRsystem, FR1 may mean a “sub 6 GHz range”, and FR2 may mean an “above 6GHz range” and may also be referred to as a millimeter wave (mmW).

TABLE 3 Frequency Range Corresponding Subcarrier designation frequencyrange Spacing (SCS) FR1  450 MHz-6000 MHz  15, 30, 60 kHz FR2 24250MHz-52600 MHz 60, 120, 240 kHz

As described above, the values of the frequency ranges in the NR systemmay be changed (or varied). For example, as shown below in Table 4, FR1may include a band within a range of 410 MHz to 7125 MHz. Morespecifically, FR1 may include a frequency band of 6 GHz (or 5850, 5900,5925 MHz, and so on) and higher. For example, a frequency band of 6 GHz(or 5850, 5900, 5925 MHz, and so on) and higher being included in FR1mat include an unlicensed band. The unlicensed band may be used fordiverse purposes, e.g., the unlicensed band for vehicle-specificcommunication (e.g., automated driving).

TABLE 4 Frequency Range Corresponding Subcarrier designation frequencyrange Spacing (SCS) FR1  410 MHz-7125 MHz  15, 30, 60 kHz FR2 24250MHz-52600 MHz 60, 120, 240 kHz

FIG. 5 shows a structure of a slot of an NR frame, based on anembodiment of the present disclosure. The embodiment of FIG. 5 may becombined with various embodiments of the present disclosure.

Referring to FIG. 5, a slot includes a plurality of symbols in a timedomain. For example, in case of a normal CP, one slot may include 14symbols. However, in case of an extended CP, one slot may include 12symbols. Alternatively, in case of a normal CP, one slot may include 7symbols. However, in case of an extended CP, one slot may include 6symbols.

A carrier includes a plurality of subcarriers in a frequency domain. AResource Block (RB) may be defined as a plurality of consecutivesubcarriers (e.g., 12 subcarriers) in the frequency domain. A BandwidthPart (BWP) may be defined as a plurality of consecutive (Physical)Resource Blocks ((P)RBs) in the frequency domain, and the BWP maycorrespond to one numerology (e.g., SCS, CP length, and so on). Acarrier may include a maximum of N number BWPs (e.g., 5 BWPs). Datacommunication may be performed via an activated BWP. Each element may bereferred to as a Resource Element (RE) within a resource grid and onecomplex symbol may be mapped to each element.

Hereinafter, a bandwidth part (BWP) and a carrier will be described.

The BWP may be a set of consecutive physical resource blocks (PRBs) in agiven numerology. The PRB may be selected from consecutive sub-sets ofcommon resource blocks (CRBs) for the given numerology on a givencarrier

For example, the BWP may be at least any one of an active BWP, aninitial BWP, and/or a default BWP. For example, the UE may not monitordownlink radio link quality in a DL BWP other than an active DL BWP on aprimary cell (PCell). For example, the UE may not receive PDCCH,physical downlink shared channel (PDSCH), or channel stateinformation—reference signal (CSI-RS) (excluding RRM) outside the activeDL BWP. For example, the UE may not trigger a channel state information(CSI) report for the inactive DL BWP. For example, the UE may nottransmit physical uplink control channel (PUCCH) or physical uplinkshared channel (PUSCH) outside an active UL BWP. For example, in adownlink case, the initial BWP may be given as a consecutive RB set fora remaining minimum system information (RMSI) control resource set(CORESET) (configured by physical broadcast channel (PBCH)). Forexample, in an uplink case, the initial BWP may be given by systeminformation block (SIB) for a random access procedure. For example, thedefault BWP may be configured by a higher layer. For example, an initialvalue of the default BWP may be an initial DL BWP. For energy saving, ifthe UE fails to detect downlink control information (DCI) during aspecific period, the UE may switch the active BWP of the UE to thedefault BWP.

Meanwhile, the BWP may be defined for SL. The same SL BWP may be used intransmission and reception. For example, a transmitting UE may transmitan SL channel or an SL signal on a specific BWP, and a receiving UE mayreceive the SL channel or the SL signal on the specific BWP. In alicensed carrier, the SL BWP may be defined separately from a Uu BWP,and the SL BWP may have configuration signaling separate from the UuBWP. For example, the UE may receive a configuration for the SL BWP fromthe BS/network. For example, the UE may receive a configuration for theUu BWP from the BS/network. The SL BWP may be (pre-)configured in acarrier with respect to an out-of-coverage NR V2X UE and an RRC_IDLE UE.For the UE in the RRC_CONNECTED mode, at least one SL BWP may beactivated in the carrier.

FIG. 6 shows an example of a BWP, based on an embodiment of the presentdisclosure. The embodiment of FIG. 6 may be combined with variousembodiments of the present disclosure. It is assumed in the embodimentof FIG. 6 that the number of BWPs is 3.

Referring to FIG. 6, a common resource block (CRB) may be a carrierresource block numbered from one end of a carrier band to the other endthereof. In addition, the PRB may be a resource block numbered withineach BWP. A point A may indicate a common reference point for a resourceblock grid.

The BWP may be configured by a point A, an offset N^(start) _(BWP) fromthe point A, and a bandwidth N^(size) _(BWP). For example, the point Amay be an external reference point of a PRB of a carrier in which asubcarrier 0 of all numerologies (e.g., all numerologies supported by anetwork on that carrier) is aligned. For example, the offset may be aPRB interval between a lowest subcarrier and the point A in a givennumerology. For example, the bandwidth may be the number of PRBs in thegiven numerology.

Hereinafter, V2X or SL communication will be described.

A sidelink synchronization signal (SLSS) may include a primary sidelinksynchronization signal (PSSS) and a secondary sidelink synchronizationsignal (SSSS), as an SL-specific sequence. The PSSS may be referred toas a sidelink primary synchronization signal (S-PSS), and the SSSS maybe referred to as a sidelink secondary synchronization signal (S-SSS).For example, length-127 M-sequences may be used for the S-PSS, andlength-127 gold sequences may be used for the S-SSS. For example, a UEmay use the S-PSS for initial signal detection and for synchronizationacquisition. For example, the UE may use the S-PSS and the S-SSS foracquisition of detailed synchronization and for detection of asynchronization signal ID.

A physical sidelink broadcast channel (PSBCH) may be a (broadcast)channel for transmitting default (system) information which must befirst known by the UE before SL signal transmission/reception. Forexample, the default information may be information related to SLSS, aduplex mode (DM), a time division duplex (TDD) uplink/downlink (UL/DL)configuration, information related to a resource pool, a type of anapplication related to the SLSS, a subframe offset, broadcastinformation, or the like. For example, for evaluation of PSBCHperformance, in NR V2X, a payload size of the PSBCH may be 56 bitsincluding 24-bit cyclic redundancy check (CRC).

The S-PSS, the S-SSS, and the PSBCH may be included in a block format(e.g., SL synchronization signal (SS)/PSBCH block, hereinafter,sidelink-synchronization signal block (S-SSB)) supporting periodicaltransmission. The S-SSB may have the same numerology (i.e., SCS and CPlength) as a physical sidelink control channel (PSCCH)/physical sidelinkshared channel (PSSCH) in a carrier, and a transmission bandwidth mayexist within a (pre-)configured sidelink (SL) BWP. For example, theS-SSB may have a bandwidth of 11 resource blocks (RBs). For example, thePSBCH may exist across 11 RBs. In addition, a frequency position of theS-SSB may be (pre-)configured. Accordingly, the UE does not have toperform hypothesis detection at frequency to discover the S-SSB in thecarrier.

FIG. 7 shows a UE performing V2X or SL communication, based on anembodiment of the present disclosure. The embodiment of FIG. 7 may becombined with various embodiments of the present disclosure.

Referring to FIG. 7, in V2X or SL communication, the term ‘UE’ maygenerally imply a UE of a user. However, if a network equipment such asa BS transmits/receives a signal according to a communication schemebetween UEs, the BS may also be regarded as a sort of the UE. Forexample, a UE 1 may be a first apparatus 100, and a UE 2 may be a secondapparatus 200.

For example, the UE 1 may select a resource unit corresponding to aspecific resource in a resource pool which implies a set of series ofresources. In addition, the UE 1 may transmit an SL signal by using theresource unit. For example, a resource pool in which the UE 1 is capableof transmitting a signal may be configured to the UE 2 which is areceiving UE, and the signal of the UE 1 may be detected in the resourcepool.

Herein, if the UE 1 is within a connectivity range of the BS, the BS mayinform the UE 1 of the resource pool. Otherwise, if the UE 1 is out ofthe connectivity range of the BS, another UE may inform the UE 1 of theresource pool, or the UE 1 may use a pre-configured resource pool.

In general, the resource pool may be configured in unit of a pluralityof resources, and each UE may select a unit of one or a plurality ofresources to use it in SL signal transmission thereof.

Hereinafter, resource allocation in SL will be described.

FIG. 8 shows a procedure of performing V2X or SL communication by a UEbased on a transmission mode, based on an embodiment of the presentdisclosure. The embodiment of FIG. 8 may be combined with variousembodiments of the present disclosure. In various embodiments of thepresent disclosure, the transmission mode may be called a mode or aresource allocation mode. Hereinafter, for convenience of explanation,in LTE, the transmission mode may be called an LTE transmission mode. InNR, the transmission mode may be called an NR resource allocation mode.

For example, (a) of FIG. 8 shows a UE operation related to an LTEtransmission mode 1 or an LTE transmission mode 3. Alternatively, forexample, (a) of FIG. 8 shows a UE operation related to an NR resourceallocation mode 1. For example, the LTE transmission mode 1 may beapplied to general SL communication, and the LTE transmission mode 3 maybe applied to V2X communication.

For example, (b) of FIG. 8 shows a UE operation related to an LTEtransmission mode 2 or an LTE transmission mode 4. Alternatively, forexample, (b) of FIG. 8 shows a UE operation related to an NR resourceallocation mode 2.

Referring to (a) of FIG. 8, in the LTE transmission mode 1, the LTEtransmission mode 3, or the NR resource allocation mode 1, a BS mayschedule an SL resource to be used by the UE for SL transmission. Forexample, the BS may perform resource scheduling to a UE 1 through aPDCCH (e.g., downlink control information (DCI)) or RRC signaling (e.g.,Configured Grant Type 1 or Configured Grant Type 2), and the UE 1 mayperform V2X or SL communication with respect to a UE 2 according to theresource scheduling. For example, the UE 1 may transmit a sidelinkcontrol information (SCI) to the UE 2 through a physical sidelinkcontrol channel (PSCCH), and thereafter transmit data based on the SCIto the UE 2 through a physical sidelink shared channel (PSSCH).

For example, in the NR resource allocation mode 1, the UE may beprovided or allocated with one or more SL transmission resources of onetransport block (TB) from the BS through a dynamic grant. For example,the BS may provide the UE with resource for PSCCH and/or PSSCHtransmission based on the dynamic grant. For example, a transmitting UEmay report to the BS an SL hybrid automatic repeat request (HARQ)feedback received from a receiving UE. In this case, based on anindication within a PDCCH used by the BS to allocate a resource for SLtransmission, a PUCCH resource and timing for reporting an SL HARQfeedback to the BS may be determined.

For example, DCI may include information related to a slot offsetbetween DCI reception and first/initial SL transmission scheduled by theDCI. For example, a minimum gap between the DCI for scheduling the SLtransmission resource and a first scheduled SL transmission resource maybe not less than a processing time of a corresponding UE.

For example, in the NR resource allocation mode 1, for multiple SLtransmissions, the UE may be periodically provided or allocated with aresource set from the BS through a configured grant. For example, theconfigured grant may include a configured grant type 1 or a configuredgrant type 2. For example, the UE may determine a TB to be transmittedin each of occasions indicated by a given configured grant.

For example, the BS may allocate an SL resource to the UE on the samecarrier, or may allocate the SL resource to the UE on a differentcarrier.

Referring to (b) of FIG. 8, in the LTE transmission mode 2, the LTEtransmission mode 4, or the NR resource allocation mode 2, the UE maydetermine an SL transmission resource within an SL resource configuredby a BS/network or a pre-configured SL resource. For example, theconfigured SL resource or the pre-configured SL resource may be aresource pool. For example, the UE may autonomously select or schedule aresource for SL transmission. For example, the UE may perform SLcommunication by autonomously selecting a resource within a configuredresource pool. For example, the UE may autonomously select a resourcewithin a selective window by performing a sensing and resource(re)selection procedure. For example, the sensing may be performed inunit of subchannels. In addition, the UE 1 which has autonomouslyselected the resource within the resource pool may transmit the SCI tothe UE 2 through a PSCCH, and thereafter may transmit data based on theSCI to the UE 2 through a PSSCH.

FIG. 9 shows three cast types, based on an embodiment of the presentdisclosure. The embodiment of FIG. 9 may be combined with variousembodiments of the present disclosure. Specifically, (a) of FIG. 9 showsbroadcast-type SL communication, (b) of FIG. 9 shows unicast type-SLcommunication, and (c) of FIG. 9 shows groupcast-type SL communication.In case of the unicast-type SL communication, a UE may performone-to-one communication with respect to another UE. In case of thegroupcast-type SL transmission, the UE may perform SL communication withrespect to one or more UEs in a group to which the UE belongs. Invarious embodiments of the present disclosure, SL groupcastcommunication may be replaced with SL multicast communication, SLone-to-many communication, or the like.

Hereinafter, a hybrid automatic repeat request (HARQ) procedure will bedescribed.

In case of SL unicast and groupcast, HARQ feedback and HARQ combining inthe physical layer may be supported. For example, when a receiving UEoperates in a resource allocation mode 1 or 2, the receiving UE mayreceive the PSSCH from a transmitting UE, and the receiving UE maytransmit HARQ feedback for the PSSCH to the transmitting UE by using asidelink feedback control information (SFCI) format through a physicalsidelink feedback channel (PSFCH).

For example, the SL HARQ feedback may be enabled for unicast. In thiscase, in a non-code block group (non-CBG) operation, if the receiving UEdecodes a PSCCH of which a target is the receiving UE and if thereceiving UE successfully decodes a transport block related to thePSCCH, the receiving UE may generate HARQ-ACK. In addition, thereceiving UE may transmit the HARQ-ACK to the transmitting UE.Otherwise, if the receiving UE cannot successfully decode the transportblock after decoding the PSCCH of which the target is the receiving UE,the receiving UE may generate the HARQ-NACK. In addition, the receivingUE may transmit HARQ-NACK to the transmitting UE.

For example, the SL HARQ feedback may be enabled for groupcast. Forexample, in the non-CBG operation, two HARQ feedback options may besupported for groupcast.

(1) Groupcast option 1: After the receiving UE decodes the PSCCH ofwhich the target is the receiving UE, if the receiving UE fails indecoding of a transport block related to the PSCCH, the receiving UE maytransmit HARQ-NACK to the transmitting UE through a PSFCH. Otherwise, ifthe receiving UE decodes the PSCCH of which the target is the receivingUE and if the receiving UE successfully decodes the transport blockrelated to the PSCCH, the receiving UE may not transmit the HARQ-ACK tothe transmitting UE.

(2) Groupcast option 2: After the receiving UE decodes the PSCCH ofwhich the target is the receiving UE, if the receiving UE fails indecoding of the transport block related to the PSCCH, the receiving UEmay transmit HARQ-NACK to the transmitting UE through the PSFCH. Inaddition, if the receiving UE decodes the PSCCH of which the target isthe receiving UE and if the receiving UE successfully decodes thetransport block related to the PSCCH, the receiving UE may transmit theHARQ-ACK to the transmitting UE through the PSFCH.

For example, if the groupcast option 1 is used in the SL HARQ feedback,all UEs performing groupcast communication may share a PSFCH resource.For example, UEs belonging to the same group may transmit HARQ feedbackby using the same PSFCH resource.

For example, if the groupcast option 2 is used in the SL HARQ feedback,each UE performing groupcast communication may use a different PSFCHresource for HARQ feedback transmission. For example, UEs belonging tothe same group may transmit HARQ feedback by using different PSFCHresources.

For example, when the SL HARQ feedback is enabled for groupcast, thereceiving UE may determine whether to transmit the HARQ feedback to thetransmitting UE based on a transmission-reception (TX-RX) distanceand/or RSRP.

For example, in the groupcast option 1, in case of the TX-RXdistance-based HARQ feedback, if the TX-RX distance is less than orequal to a communication range requirement, the receiving UE maytransmit HARQ feedback for the PSSCH to the transmitting UE. Otherwise,if the TX-RX distance is greater than the communication rangerequirement, the receiving UE may not transmit the HARQ feedback for thePSSCH to the transmitting UE. For example, the transmitting UE mayinform the receiving UE of a location of the transmitting UE through SCIrelated to the PSSCH. For example, the SCI related to the PSSCH may besecond SCI. For example, the receiving UE may estimate or obtain theTX-RX distance based on a location of the receiving UE and the locationof the transmitting UE. For example, the receiving UE may decode the SCIrelated to the PSSCH and thus may know the communication rangerequirement used in the PSSCH.

For example, in case of the resource allocation mode 1, a time (offset)between the PSFCH and the PSSCH may be configured or pre-configured. Incase of unicast and groupcast, if retransmission is necessary on SL,this may be indicated to a BS by an in-coverage UE which uses the PUCCH.The transmitting UE may transmit an indication to a serving BS of thetransmitting UE in a form of scheduling request (SR)/buffer statusreport (BSR), not a form of HARQ ACK/NACK. In addition, even if the BSdoes not receive the indication, the BS may schedule an SLretransmission resource to the UE. For example, in case of the resourceallocation mode 2, a time (offset) between the PSFCH and the PSSCH maybe configured or pre-configured.

For example, from a perspective of UE transmission in a carrier, TDMbetween the PSCCH/PSSCH and the PSFCH may be allowed for a PSFCH formatfor SL in a slot. For example, a sequence-based PSFCH format having asingle symbol may be supported. Herein, the single symbol may not an AGCduration. For example, the sequence-based PSFCH format may be applied tounicast and groupcast.

For example, in a slot related to a resource pool, a PSFCH resource maybe configured periodically as N slot durations, or may bepre-configured. For example, N may be configured as one or more valuesgreater than or equal to 1. For example, N may be 1, 2, or 4. Forexample, HARQ feedback for transmission in a specific resource pool maybe transmitted only through a PSFCH on the specific resource pool.

For example, if the transmitting UE transmits the PSSCH to the receivingUE across a slot #X to a slot #N, the receiving UE may transmit HARQfeedback for the PSSCH to the transmitting UE in a slot #(N+A). Forexample, the slot #(N+A) may include a PSFCH resource. Herein, forexample, A may be a smallest integer greater than or equal to K. Forexample, K may be the number of logical slots. In this case, K may bethe number of slots in a resource pool. Alternatively, for example, Kmay be the number of physical slots. In this case, K may be the numberof slots inside or outside the resource pool.

For example, if the receiving UE transmits HARQ feedback on a PSFCHresource in response to one PSSCH transmitted by the transmitting UE tothe receiving UE, the receiving UE may determine a frequency domainand/or code domain of the PSFCH resource based on an implicit mechanismin a configured resource pool. For example, the receiving UE maydetermine the frequency domain and/or code domain of the PSFCH resource,based on at least one of a slot index related to PSCCH/PSSCH/PSFCH, asub-channel related to PSCCH/PSSCH, and/or an identifier for identifyingeach receiving UE in a group for HARQ feedback based on the groupcastoption 2. Additionally/alternatively, for example, the receiving UE maydetermine the frequency domain and/or code domain of the PSFCH resource,based on at least one of SL RSRP, SINR, L1 source ID, and/or locationinformation.

For example, if HARQ feedback transmission through the PSFCH of the UEand HARQ feedback reception through the PSFCH overlap, the UE may selectany one of HARQ feedback transmission through the PSFCH and HARQfeedback reception through the PSFCH based on a priority rule. Forexample, the priority rule may be based on at least priority indicationof the related PSCCH/PSSCH.

For example, if HARQ feedback transmission of a UE through a PSFCH for aplurality of UEs overlaps, the UE may select specific HARQ feedbacktransmission based on the priority rule. For example, the priority rulemay be based on at least priority indication of the related PSCCH/PSSCH.

Hereinafter, a sidelink control information (SCI) will be described.

Control information transmitted by a BS to a UE through a PDCCH may bereferred to as downlink control information (DCI), whereas controlinformation transmitted by the UE to another UE through a PSCCH may bereferred to as SCI. For example, the UE may know in advance a startsymbol of the PSCCH and/or the number of symbols of the PSCCH, beforedecoding the PSCCH. For example, the SCI may include SL schedulinginformation. For example, the UE may transmit at least one SCI toanother UE to schedule the PSSCH. For example, one or more SCI formatsmay be defined.

For example, a transmitting UE may transmit the SCI to a receiving UE onthe PSCCH. The receiving UE may decode one SCI to receive the PSSCH fromthe transmitting UE.

For example, the transmitting UE may transmit two consecutive SCIs(e.g., 2-stage SCI) to the receiving UE on the PSCCH and/or the PSSCH.The receiving UE may decode the two consecutive SCIs (e.g., 2-stage SCI)to receive the PSSCH from the transmitting UE. For example, if SCIconfiguration fields are divided into two groups in consideration of a(relatively) high SCI payload size, an SCI including a first SCIconfiguration field group may be referred to as a first SCI or a 1^(st)SCI, and an SCI including a second SCI configuration field group may bereferred to as a second SCI or a 2^(nd) SCI. For example, thetransmitting UE may transmit the first SCI to the receiving UE throughthe PSCCH. For example, the transmitting UE may transmit the second SCIto the receiving UE on the PSCCH and/or the PSSCH. For example, thesecond SCI may be transmitted to the receiving UE through an(independent) PSCCH, or may be transmitted in a piggyback mannertogether with data through the PSSCH. For example, two consecutive SCIsmay also be applied to different transmissions (e.g., unicast,broadcast, or groupcast).

For example, the transmitting UE may transmit the entirety or part ofinformation described below to the receiving UE through the SCI. Herein,for example, the transmitting UE may transmit the entirety or part ofthe information described below to the receiving UE through the firstSCI and/or the second SCI.

-   -   PSSCH and/or PSCCH related resource allocation information,        e.g., the number/positions of time/frequency resources, resource        reservation information (e.g., period), and/or    -   SL CSI report request indicator or SL (L1) RSRP (and/or SL (L1)        RSRQ and/or SL (L1) RSSI) report request indicator, and/or    -   SL CSI transmission indicator (or SL (L1) RSRP (and/or SL (L1)        RSRQ and/or SL (L1) RSSI) information transmission indicator))        (on PSSCH), and/or    -   MCS information, and/or    -   Transmit power information, and/or    -   L1 destination ID information and/or L1 source ID information,        and/or    -   SL HARQ process ID information, and/or    -   New data indicator (NDI) information, and/or    -   Redundancy version (RV) information, and/or    -   (Transmission traffic/packet related) QoS information, e.g.,        priority information, and/or    -   SL CSI-RS transmission indicator or information on the number of        (to-be-transmitted) SL CSI-RS antenna ports, and/or    -   Location information of a transmitting UE or location (or        distance region) information of a target receiving UE (for which        SL HARQ feedback is requested), and/or    -   Reference signal (e.g., DMRS, etc.) related to channel        estimation and/or decoding of data to be transmitted through a        PSSCH, e.g., information related to a pattern of a        (time-frequency) mapping resource of DMRS, rank information,        antenna port index information

For example, the first SCI may include information related to channelsensing. For example, the receiving UE may decode the second SCI byusing a PSSCH DMRS. A polar code used in a PDCCH may be applied to thesecond SCI. For example, in a resource pool, a payload size of the firstSCI may be identical for unicast, groupcast, and broadcast. Afterdecoding the first SCI, the receiving UE does not have to perform blinddecoding of the second SCI. For example, the first SCI may includescheduling information of the second SCI.

Meanwhile, in various embodiments of the present disclosure, since atransmitting UE may transmit at least one of a SCI, a first SCI, and/ora second SCI to a receiving UE through a PSCCH, the PSCCH may bereplaced/substituted with at least one of the SCI, the first SCI and/orthe second SCI. Additionally/alternatively, for example, the SCI may bereplaced/substituted with at least one of the PSCCH, the first SCI,and/or the second SCI. Additionally/alternatively, for example, since atransmitting UE may transmit a second SCI to a receiving UE through aPSSCH, the PSSCH may be replaced/substituted with the second SCI.

Meanwhile, in various embodiments of the present disclosure, forexample, “configuration” or “definition” may include that a base stationor a network transmits information related to “configuration” orinformation related to “definition” to UE(s) through pre-definedsignaling (e.g., SIB, MAC, RRC, etc.). For example, “configuration” or“definition” may include that a base station or a network pre-configuresinformation related to “configuration” or information related to“definition” to UE(s).

Meanwhile, in mode 1 operation in which resource(s) is allocated andtransmission is scheduled by a base station in SL communication, thebase station may determine resource(s) related to a PSCCH, a PSSCH, anda PSFCH to be transmitted by a UE for SL communication and/orresource(s) related to a PUCCH through which the UE transmits HARQfeedback to the base station, and the base station may allocate thedetermined resource(s) to the UE. For example, the base station maytransmit information related to the timing and the location of theresource(s) to the UE through a DCI and/or an RRC message. For example,in mode 1 operation, a method for the base station to allocateresource(s) to the UE may be as follows.

(1) Dynamic Grant (DG): the base station may directly and dynamicallyallocate resource(s) to the UE based on the DG. For example, the basestation may transmit a DCI including information related to DGresource(s) to the UE.

(2) Configured Grant (CG) type-1: the base station may allocate periodictransmission resources to the UE through higher layer signaling. Forexample, the higher layer signaling may be RRC signaling.

(3) Configured Grant (CG) type-2: the base station may allocate periodictransmission resources to the UE through higher layer signaling, and thebase station may dynamically activate or deactivate the periodictransmission resources through a DCI. For example, the higher layersignaling may be RRC signaling.

In the present disclosure, resource(s) allocated by the DG may bereferred to as DG resource(s), and resource(s) allocated by the CG maybe referred to as CG resource(s). Furthermore, resource(s) allocated bythe CG type-1 may be referred to as CC type-1 resource(s), andresource(s) allocated by the CG type-2 may be referred to as CG type-2resource(s).

Meanwhile, if the UE receives information related to CG resource(s), aunit of a slot to which a time offset, a period, etc. is applied (e.g.,a unit of a logical slot or a unit of a physical slot) needs to beclearly defined. Furthermore, if the UE determines the location of CGresource(s) by performing a modular operation for a value obtained basedon the time offset, the period, etc., a value used for the modularoperation needs to be defined. If the above is not defined, adiscrepancy may occur between SL resource(s) used by the UE which hasreceived the information related to the CG resource(s) and SLresource(s) allocated by the base station to the UE, which may beundesirable in terms of radio resource management and quality assuranceof SL communication.

Based on various embodiments of the present disclosure, a method fordetermining SL transmission resource(s) based on the CG type-1 and theCG type-2 in resource allocation mode 1 and device(s) supporting thesame are proposed.

For example, configuration information related to the CG type-1transmitted by the base station to the UE through RRC signaling mayinclude the following. For convenience of description, the configurationinformation related to the CG type-1 transmitted by the base station tothe UE through RRC signaling may be referred to as an RRC configurationor RRC configuration information.

-   -   First offset: a timing offset for the first CG resource    -   Period: interval period between CG resources allocated        periodically by the base station

Table 5 and Table 6 show examples of configuration information relatedto the CG.

TABLE 5 -- A

START -- T

-

-CON

-START SL-Configured

rantConfig-r1

 ::= SEQUENCE {  

l-C

figIndex

-r16  

L-C

-r1

,  

l-Period

-r1

 

L-Period

-r1

OPTIONAL, -- Need

 

l-Nr

-

-r1

 INTEGER (1..1

) OPTIONAL, -- Need

 

l-HA

Q-

-off

t-r1

 INTEGER (0..1

) OPTIONAL, -- Need

 

l-C

-

List-r1

 

L-

-

List-r1

OPTIONAL, -- Need

 

-ConfiguredSidelinkG

t-r16  SEQUENCE

  

l-TimeResource

-Type1-r1

  INTEGER (0..49

) OPTIONAL, -- Need

  

l-StartSubchannelCG-Type1-r16   INTEGER (0..2

) OPTIONAL, -- Need

  

l-

qResource

G-Type1-r16   INTEGER (0..

929) OPTIONAL, -- Need

  

l-TimeOf

et

-Type1-r16   INTEGER (0..7

9

) OPTIONAL, -- Need

  

l-N1PU

CH-

-r16   PUCCH-

OPTIONAL, -- Need

  

l-P

-ToPUCC

-CG-Type1-r1

  INTEGER (0..1

) OPTIONAL, -- Need

  

l-ResourcePoolID-r16   SL-Resource

-r1

OPTIONAL, -- Need

  

l-TimeRe

nce

N-Type1-r

  ENUMERATED {sfn512} OPTIONAL -- Need

 } OPTIONAL, -- Need

 ...,  

 

l-N1P

CCH-AN-Type2-

 PUCCH-ResourceId OPTIONAL -- Need

 

}

L-Con

-r1

 ::

 INTEGER (

..

-

-

-

)

L-C

-

List-r1

 ::

 SEQUENCE (

 (1.

), OF

-

-

-r

L-C

-

Tran

-r1

 ::

SEQUENCE {  

l-Priori

y-r1

 

 (1..

,  

l-MaxTrans

-r1

 

 (1..32) }

-Period

-r1

 ::

CHOICE

 

l-Period

1-r1

  

 {

100,

200,

3

0,

400,

00,

00,

700,

800,

9

,   

10

0, spare

,  spare

, spare

, spare

, spare2, spare1},  

l-Period

2-r1

  INTEGER (

.

) } -- TAG-SL-

-STOP --

STOP

indicates data missing or illegible when filed

TABLE 6 SL-ConfiguredGrantConfig field descriptions sl-ConfigIndexCGThis field indicates the ID to identify configured grant for sidelink.sl-CG-MaxTransNumList This field indicates the maximum number of timesthat a TB can be transmitted using the resources provided by theconfigured grant. sl-Priority corresponds to the logical channelpriority. sl-FreqResourceCG-Type1 Indicates the frequency resourcelocation of sidelink configured grant type 1. An index giving validcombinations of one or two starting sub-channel and length (joinlyencoded) as resource indicator (RIV), as defined in TS 38.214 [1

]. sl-HARQ-ProcID-Offset Indicates the offset used in deriving the HARQprocess IDs for SL configured grant type 1 or SL configured type 2, seeTS 38.321 [3], clause

.8.3. sl-N1PUCCH-AN This field indicates the HARQ resource for PUCCH forsidelink configured grant type 1. The actual PUCCH-Resource isconfigured in sl-PUCCH-Config and referred to by its ID.sl-N1PUCCH-AN-Type2 This field indicates the HARQ resource for PUCCH forPSCCH/PSSCH transmissions without a corresponding PDCCH on sidelinkconfigured grant type 2. The actual PUCCH-Resource is configured insl-PUCCH-Config and referred to by its ID. sl-NrOfHARQ-Processes Thisfield indicates the number of HARQ processes configured for a specificconfigured grant. It applies for both Type 1 and Type 2. sl-PeriodCGThis field indicates the period of sidelink configured grant in the unitof ms. sl-PSFCH-ToPUCCH-CG-Type1 This field, for configured grant type1, indicates slot offset between the PSFCH associated with the lastPSSCH resource of each period and the PUCCH occasion used for reportingsidelink HARQ. sl-ResourcePoolID Indicates the resource pool in whichthe configured sidelink grant Type 1 is applied.sl-StartSubchannelCG-Type1 This field indicates the starting sub-channelof sidelink configured grant Type 1. An index giving valid sub-channelindex. sl-TimeOffsetCG-Type1 This field indicates the

 offset with respect to logical slot defined bysl-TimeReferenceSFN-Type1, as specified in TS 38.321 [3].sl-TimeReferenceSFN-Type1 Indicates SFN used for determination of theoffset of a resource in time domain. If it is present, the UE uses the1^(st) logical slot of associated resource pool after the starting timeof the closest SFN with the indicated number preceding the reception ofthe sidelink configured grant configuration Type 1 as reference logicalslot, see TS 38.321 [3], clause 5.8.3. If it is not present, thereference SFN is 0. sl-TimeResourceCG-Type1 This field indicates thetime resource location of sidelink configured grant Type 1. An indexgiving valid combinations of up to two slot positions (jointly encoded)as time resource indicator (TRIV), as defined in TS 38.212 [17].

indicates data missing or illegible when filed

FIG. 10 shows an example of CG type-1 resource(s), based on anembodiment of the present disclosure. The embodiment of FIG. 10 may becombined with various embodiments of the present disclosure.

FIG. 11 shows an example of CG type-2 resource(s), based on anembodiment of the present disclosure. The embodiment of FIG. 11 may becombined with various embodiments of the present disclosure.

For example, if the base station configures a period of CG type-2resource(s) to the UE through RRC signaling, and the base stationconfigures a second offset for activation/deactivation of the CG type-2resource(s) to the UE through a DCI, the UE may determine the first SLresource corresponding to the CG type-2 resource(s) to transmit aPSCCH/PSSCH, based on the time of receiving the DCI and the secondoffset signaled through the DCI.

For example, the base station may configure a first offset and a periodto the UE in a unit of SL slots belonging to a SL resource pool, bylimiting resources in the SL resource pool to which the CG type-1resource(s) is to be configured. For example, the base station maytransmit information related to the first offset and information relatedto the period to the UE in a unit of SL slots belonging to the SLresource pool, by limiting resources in the SL resource pool to whichthe CG type-1 resource(s) is to be configured. Therefore, resource(s)which does not belong to the SL resource pool, such as S-SSB resource(s)(e.g., resource(s) for S-SSB transmission and S-SSB reception) orreserved resource(s), may be excluded from the CG type-1 resource(s).

For example, the UE may be allocated the CG type-1 resource(s) or the CGtype-2 resource(s) from the base station through an RRC message and/or aDCI. In this case, the UE may determine the CG type-1 resource(s) or theCG type-2 resource(s) based on Table 7. Specifically, for example, forspecific SL slot(s) that satisfies the equation in Table 7, the UE maydetermine/consider the specific SL slot(s) as the CG type-1 resource(s)or the CG type-2 resource(s), and the UE may perform SL communicationbased on the CG type-1 resource(s) or the CG type-2 resource(s).

TABLE 7 After a sidelink grant is configured for a configured grant Type1, the MAC entity shall consider sequentially that the first slot of theS^(th) sidelink grant occurs in the logical slot for which:  [(SFN_(RP)× numberOfSLSlotsPerFrame_(RP)) + logical slot number in the frame_(RP)]=  (timeReferenceSFN × numberOfSLSlotsPerFrame_(RP) +sl-TimeOffsetCGType1 + S × PeriodictySL) modulo  (1024 ×numberOfSLSlotsPerFrame_(RP)). where a frame_(RP) is the SL logicalframe that comprises 2^(μ) ·10 SL logical slots in the SL resource pool,and SFN_(RP) refers to the frame_(RP) number within 1024 frame_(RP),where SFN_(RP) = 0 refers to the earliest frame_(RP) that is not earlierthan SFN = 0.${{PeriodicitySL} = \left\lceil {\frac{N}{20\mspace{14mu}{ms}} \times {sl\_ periodCG}} \right\rceil},$and numberOfSLSlotsPerFrame_(RP) and N refer to the number of SL logicalslots in the frame_(RP) and the number of logical slots that can be usedfor SL transmission in 20 ms, respectively. After a sidelink grant isconfigured for a configured grant Type 2, the MAC entity shall considersequentially that the first slot of S^(th) sidelink grant occurs in thelogical slot for which:  [(SFN_(SL) × numberOfSLSlotsPerFrame_(RP)) +logical slot number in the frame_(Rp)] =  [(SFN_(start time) ×numberOfSLSlotsPerFrame_(RP) + slot_(start time)) + S × PeriodicitySL]modulo  (1024 × numberOfSLSlotsPerFrame_(RP)). where SFN_(SL) refers tothe frame_(RP) number within 1024 frame_(RP), where SFN_(SL) = 0 refersto the earliest frame_(RP) that is not earlier than SFN_(start time).SFN_(start time) and slot_(start time) are the SFN and logical slot,respectively, of the first transmission opportunity of PSSCH where theconfigured sidelink grant was (re-)initialised.

In Table 7, sl_periodCG may be a value in which the first offset isconfigured as an absolute time value (e.g., ms).

For example, since S-SSB resource(s) and reserved resource(s) are notincluded in the SL resource pool, if the base station configures thefirst offset as an absolute time value (e.g., ms) such as sl_periodCG,the number of SL logical slots belonging to the SL resource poolcorresponding to the first offset time may be variable. In order toresolve such ambiguity, the UE may calculate/obtain a final valuerepresented by SL logical slots belonging to the SL resource pool basedon Table 8.

TABLE 8 After a sidelink grant is configured for a configured grant Type1, the MAC entity shall consider sequentially that the first slot of theS^(th) sidelink grant occurs in the logical slot for which:  [(SFN_(RP)× numberOfSLSlotsPerFrame_(RP)) + logical slot number in the frame_(Rp)]=  (timeReferenceSFN × numberOfSLSlotsPerFrame_(RP) +sl-TimeOffsetCGType1 + S × PeriodictySL) modulo  (1024 ×numberOfSLSlotsPerFrame_(RP)). where a frame_(RP) is the SL logicalframe that comprises 2^(μ) ·10 SL logical slots in the SL resource pool,and SFN_(RP) refers to the frame_(RP) number within 1024 frame_(RP),where SFN_(RP) = 0 refers to the earliest frame_(RP) that is not earlierthan SFN = 0.${{PeriodicitySL} = \left\lceil {\frac{N}{20\mspace{14mu}{ms}} \times {sl\_ periodCG} \times \frac{N_{bitmap}^{1}}{{bitmap}\;{length}}} \right\rceil},$and numberOfSLSlotsPerFrame_(RP) and N refer to the number of SL logicalslots in the frame_(RP) and the number of logical slots that can be usedfor SL transmission in 20 ms, respectively. After a sidelink grant isconfigured for a configured grant Type 2, the MAC entity shall considersequentially that the first slot of S^(th) sidelink grant occurs in thelogical slot for which:  [(SFN_(SL) × numberOfSLSlotsPerFrame_(RP)) +logical slot number in the frame_(Rp)] =  [(SFN_(start time) ×numberOfSLSlotsPerFrame_(RP) + slot_(start time)) + S × PeriodicitySL]modulo  (1024 × numberOfSLSlotsPerFrame_(RP)). where SFN_(SL) refers tothe frame_(RP) number within 1024 frame_(RP), where SFN_(SL) = 0 refersto the earliest frame_(RP) that is not earlier than SFN_(start time).SFN_(start time) and slot_(start time) are the SFN and logical slot,respectively, of the first transmission opportunity of PSSCH where theconfigured sidelink grant was (re-)initialised.

In Table 8, N¹ _(bitmap) may indicate/represent the total number of ‘1’sin the bitmap for determining the SL resource pool, and bitmap lengthmay indicate/represent the total number of bits in the bitmap fordetermining the SL resource pool.

For example, the UE may be allocated the CG type-1 resource(s) or the CGtype-2 resource(s) from the base station through an RRC message and/or aDCI. In this case, the UE may determine the CG type-1 resource(s) or theCG type-2 resource(s) based on Table 9. Specifically, for example, forspecific SL slot(s) that satisfies the equation in Table 9, the UE maydetermine/consider the specific SL slot(s) as the CG type-1 resource(s)or the CG type-2 resource(s), and the UE may perform SL communicationbased on the CG type-1 resource(s) or the CG type-2 resource(s).

TABLE 9 After a sidelink grant is configured for a configured grant Type1, the MAC entity shall consider sequentially that the first slot of theS^(th) sidelink grant occurs in the logical slot for which:  [(SFN ×numberOfSLSlotsPerFrame) + logical slot number in the frame_(RP)] = (timeReferenceSFN × numberOfSLSlotsPerFrame + sl-TimeOffsetCGType1 + S× PeriodictySL) modulo  (1024 × numberOfSLSlotsPerFrame). where${{PeriodicitySL} = \left\lceil {\frac{N}{20\mspace{14mu}{ms}} \times {sl\_ periodCG}} \right\rceil},$and N refers to the number of logical slots that can be used for SLtransmsission in 20 ms, respectively, as specified in clause 8.1.7 of TS38.214 [7]. numberOfSLSlotsPerFrame is determined as (number of SLlogical slots per 1024 frames)/1024. After a sidelink grant isconfigured for a configured grant Type 2, the MAC entity shall considersequentially that the first slot of S^(th) sidelink grant occurs in thelogical slot for which:  [(SFN × numberOfSLSlotsPerFrame) + logical slotnumber in the frame] =  [(SFN_(start time) × numberOfSLSlotsPerFrame +slot_(start time)) + S × PeriodicitySL] modulo  (1024 ×numberOfSLSlotsPerFrame). where SFN_(start time) and slot_(start time)are the SFN and logical slot respectively, of the first transmissionopportunity of PSSCH where the configured sidelink grant was(re-)initialised.

In Table 9, the UE may expect/determine that the base stationconfigures/sets a value of numberOfSLSIotsPerFrame as/to a fixed naturalnumber value for each physical frame. For example, the base station maytransmit a value of numberOfSLSlotsPerFrame having a fixed naturalnumber value to the UE for each physical frame. For example, if thevalue of numberOfSLSlotsPerFrame is not a natural number, the UE maydetermine/convert the value of numberOfSLSlotsPerFrame to a rounded-upvalue of numberOfSLSlotsPerFrame. For example, if the value ofnumberOfSLSlotsPerFrame is not a natural number, the UE maydetermine/convert the value of numberOfSLSlotsPerFrame to a rounded-downvalue of numberOfSLSlotsPerFrame. For example, if the value ofnumberOfSLSlotsPerFrame is not a natural number, the UE maydetermine/convert the value of numberOfSLSlotsPerFrame to a rounded-offvalue of numberOfSLSlotsPerFrame. For example, if a slot determined bythe equation in Table 9 is not a resource belonging to the SL resourcepool, the UE may determine a SL slot belonging to the SL resource poolclosest in time as a CG resource, which is not faster than a slotsatisfying the above equation.

For example, the UE may be allocated the CG type-1 resource(s) or the CGtype-2 resource(s) from the base station through an RRC message and/or aDCI. In this case, the UE may determine the CG type-1 resource(s) or theCG type-2 resource(s) based on Table 10. Specifically, for example, forspecific SL slot(s) that satisfies the equation in Table 10, the UE maydetermine/consider the specific SL slot(s) as the CG type-1 resource(s)or the CG type-2 resource(s), and the UE may perform SL communicationbased on the CG type-1 resource(s) or the CG type-2 resource(s).

TABLE 10 After a sidelink grant is configured for a configured grantType 1, the MAC entity shall consider sequentially that the first slotof the S^(th) sidelink grant occurs in the logical slot for which: [Σ_(i=0) ^(SFN−1) numberofSLSlotsPer Frame_(i) + SL logical slot numberin the frame] =  (Σ_(i=0) ^(timeReferenceSFN−1)numberofSLSlotsPerFrame_(i) + sl-TimeOffsetCGType1 + S × PeriodicitySL)modulo  (number of logical slots per 1024 frames). where${{PeriodicitySL} = \left\lceil {\frac{N}{20\mspace{14mu}{ms}} \times {sl\_ periodCG}} \right\rceil},$and N refers to the number of slots that can used for SL transmsissionin 20 ms, as specified in clause 8.1.7 of TS 38.214 [7], andnumberofSLSlotsPerFrame_(i) is the number of SL logical slots in thei-th frame. After a sidelink grant is configured for a configured grantType 2, the MAC entity shall consider sequentially that the first slotof S^(th) sidelink grant occurs in the logical slot for which:  [Σ_(i=0)^(SFN−1) numberofSLSlotsPer Frame_(i) + logical slot number in theframe] =  [(Σ_(i=0) ^(SFN) _(start) _(time) ⁻¹numberofSLSlotsPerFrame_(i) + slot_(start time)) + S × PeriodicitySL)modulo  (1024 × numberOfSLSlotsPerFrame). where SFN_(start time) andslot_(start time) are the SFN and logical slot, respectively, of thefirst transmission opportunity of PSSCH where the configured sidelinkgrant was (re-)initialised.

In Table 10, since the number of SL logical slots belonging to the SLresource pool or SL resources that can be used for SL communication maybe different for each physical frame, the UE may determine the CG type-1resource(s) or the CG type-2 resource(s) based onnumberofSLSlotsPerFrame_(i), which is the number of SL logical slotsbelonging to every i-th frame. Specifically, the UE may determinespecific SL slot(s) that satisfies the equation in Table 10 as the CGtype-1 resource(s) or the CG type-2 resource(s), by considering thenumber of SL logical slots belonging to every i-th frame.

For example, the UE may obtain a first value, based on at least one ofinformation related to a time offset (e.g., sl-TimeOffsetCGType1),information related to a period (e.g., PeriodicitySL), and/orinformation indicating/representing which period CG resource(s) belongsto (i.e., information indicating/representing the order of the period towhich CG resource(s) belongs) (e.g., S). In addition, the UE may obtaina second value which is a remainder value obtained by dividing the firstvalue by the number of logical slots in 1024 frames (the number oflogical slots per 1024 frames). That is, the UE may obtain the secondvalue, which is a remainder value obtained by dividing the first valueby the number of slots belonging to the resource pool within 10240 ms.Thereafter, the UE may determine that a slot corresponding to the secondvalue is the first slot of the S-th SL grant.

FIG. 12 shows a procedure for a UE to determine SL resource(s) based oninformation related to a CG configuration, based on an embodiment of thepresent disclosure. The embodiment of FIG. 12 may be combined withvarious embodiments of the present disclosure.

Referring to FIG. 12, in step S1210, a first UE may receive informationrelated to a CG configuration from a base station. For example, theinformation related to the CG configuration may be configured as shownin Table 5 and Table 6. For example, the information related to the CGconfiguration may include information related to a period of CGresource(s) and information related to a time offset.

In step S1220, the first UE may determine SL resource(s) based on theinformation related to the CG configuration. For example, the first UEmay determine the first SL resource (i.e., the first slot) for eachperiod, based on the information related to the period of the CGresource(s) and the information related to the time offset. For example,the first UE may determine the first SL resource (i.e., the first slot)for each period, based on at least one of Table 7 to Table 11.

TABLE 11 After a sidelink grant is configured for a configured grantType 1, the MAC entity shall consider sequentially that the first slotof the S^(th) sidelink grant occurs in the logical slot for which:CURRENT_slot − (sl-ReferenceSlotCG-Typel + sl-TimeOffsetCG-Type1 + S ×PeriodictySL) modulo T_(max)′ where CURRENT_slot refers to currentlogical slot in the associated resource pool,${periodicitySL} = \left\lceil {\frac{T_{\max}^{\prime}}{10240\mspace{14mu}{ms}} \times {sl\_ periodCG}} \right\rceil$and T_(max)′ is the number of slots that belongs to the associatedresource pool as defined in clause 8 of TS 38.214[7].sl-ReferenceSlotCG-Type 1 refers to reference logical slot defined bysl-TimeReferenceSFN-Type1. After a sidelink grant is configured for aconfigured grant Type 2, the MAC entity shall consider sequentially thatthe first slot of S^(th) sidelink grant occurs in the logical slot forwhich: CURRENT_slot = (sl-StartSlotCG-Type2 + S × PeriodicitySL) moduloT_(max)′ where sl-StartSlotCG-Type2 refers to the logical slot of thefirst transmission opportunity of PSSCH where the configured sidelinkgrant was (re)initialised.

For example, for the S-th period, the first UE may obtain a first valuebased on the information related to the time offset and the informationrelated to the period of the CG resource(s) (i.e., information relatedto the period of the logical unit). In addition, the first UE may obtaina remainder value (i.e., a second value) obtained by dividing the firstvalue by the number of slots belonging to the resource pool (T′_(max)).Herein, the first UE may determine that a slot corresponding to thesecond value is a slot including the first CG resource of the S-thperiod. In the above embodiment, the information related to the periodof the CG resource(s) may be provided by the base station in a physicaltime unit (e.g., ms), and the first UE may convert the period of the CGresource(s), which is the physical time unit, into a logical time unitbased on the number of slots belonging to the resource pool within 10240ms. For example, the number of slots belonging to the resource pool maybe obtained based on Table 12.

TABLE 12 The set of slots that may belong to a sidelink resource pool isdenoted by (t₀ ^(SL), t₁ ^(SL), . . . , t_(T) _(max) ⁻¹ ^(SL)) where  0≤ t_(i) ^(SL) < 10240 × 2^(μ), 0 ≤ i < T_(max),  the slot index isrelative to slot#0 of the radio frame corresponding to SFN 0 of theserving cell or DFN 0,  the set includes all the slots except thefollowing slots,   N_(S)_ SSB slots in which S-SS/PSBCH block (S-SSB) isconfigured,   N_(nonSL) slots in each of which at least one of Y-th,(Y + 1)-th, . . . , (Y + X − 1)-th OFDM symbols are   notsemi-statically configured as UL as per the higher layer parametertdd-UL-DL-   ConfigurationCommon-r16 of the serving cell if provided orsl-TDD-Configuration-r16 if   provided or sl-TDD-Config-r16 of thereceived PSBCH if provided, where Y and X are set by the   higher layerparameters sl-StartSymbol and sl-LengthSymbols, respectively.   Thereserved slots which are determined by the following steps.   1) theremaining slots excluding N_(S)_ SSB slots and N_(nonSL) slots from theset of all the slots are   denoted by (l₀, l₁, . . . , l_((1024×2) ^(μ)_(−NS) _(SSB) _(−N) _(nonSL) ⁻¹⁾) arranged in increasing order of slotindex.   2) a slot l_(r) (0 ≤ r < 10240 × 2^(μ)−N_(S) _(SSB) −N_(nonSL))belongs to the reserved slots if   ${r = \left\lfloor \frac{m \cdot \left( {{10240 \times 2^{\mu}} - N_{S_{SSB}} - N_{nonSL}} \right)}{N_{reserved}} \right\rfloor},$  here m = 0, 1, . . . , N _(reserved) −1 and N_(reserved) =   (10240 ×2^(μ) − N_(S) _(SSB) −N_(nonSL)) mod L_(bitmap) where L_(bitmap) denotesthe length of bitmap   configured by higher layers.  The slots in theset are arranged in increasing order of slot index. The UE determinesthe set of slots assigned to a sidelink resource pool as follows:  abitmap (b₀, b₁, . . . , bit_(L) _(bitmap) ⁻¹⁾ associated with theresource pool is used where L_(bitmap) the length  of the bitmap isconfigured by higer layers.  a slot t_(k) ^(SL) (0 ≤ k < 10240 × 2^(μ) −N_(S) _(SSB) − N_(nonSL) − N_(reserved)) belongs to the set if b_(k′) =1 where  k′ = k mod L_(bitmap).  The slots in the set are re-indexedsuch that the subscripts i of the remaining slots t_(i)′^(SL) are successive {0, 1, . . . , T_(max)′−1 where T_(max)′is the number of theslots remaining in the set. The UE determines the set of resource blocksassigned to a sidelink resource pool as follows:  The resource blockpool consists of N_(PRB) PRBs.  The sub-channel m for m = 0, 1, . . .,numSubchannel − 1 consists of a set of n_(subCHsize) contiguous resource blocks with the physical resource block number n_(PRB) =n_(subCHRBstart) + m · n_(subCHsize) + j  for j = 0, 1, . . . ,n_(subCHsize) − 1, where n_(subCHRBstart) and n_(subCHsize) are givenhigher layer  parameters sl-StartRB-Subchannel and sl-SubchannelSize,respectively A UE is not expected to use the last N_(PRB) modn_(subCHsize) PRBs in the resource pool.

In step S1230, the first UE may transmit the PSCCH to the second UEbased on the SL resource(s). In step S1240, the first UE may transmitthe PSSCH related to the PSCCH to the second UE based on the SLresource(s).

FIG. 13 shows a method for a first device to perform wirelesscommunication, based on an embodiment of the present disclosure. Theembodiment of FIG. 13 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 13, in step S1310, the first device may receive, froma base station, information related to a time offset of a sidelink (SL)resource and information related to a first period of the SL resource.In step S1320, the first device may determine a number of slotsbelonging to a resource pool within 10240 ms. In step S1330, the firstdevice may obtain information related to a second period in a logicalslot unit, from the information related to the first period based on thenumber of slots belonging to the resource pool. In step S1340, the firstdevice may determine a time domain of the SL resource based on theinformation related to the second period, the information related to thetime offset, and the number of slots belonging to the resource pool.

Additionally, for example, the first device may obtain a remainder valueby dividing a value obtained based on the information related to thesecond period and the information related to the time offset by thenumber of slots belonging to the resource pool within the 10240 ms. Forexample, the time domain of the SL resource may be determined based onthe remainder value. For example, the time domain of the SL resource maybe a slot represented by the remainder value. For example, the slotrepresented by the remainder value may be a 1^(st) slot of a SL grant ina period. For example, a value obtained based on the information relatedto the second period and the information related to the time offset maybe a slot index value.

For example, the number of slots belonging to the resource pool withinthe 10240 ms is determined by excluding a number of slots forsidelink-synchronization signal block (S-SSB) and a number of reservedslots from a number of slots available for SL transmission belonging tothe 10240 ms. For example, the number of slots belonging to the resourcepool within the 10240 ms may be determined based on a number of bits setto 1 among bits of a bitmap related to the resource pool.

Additionally, for example, the first device may obtain a first value bymultiplying the information related to the second period by a value ofS. Additionally, for example, the first device may obtain a second valueby adding the information related to the time offset to the first value.Additionally, for example, the first device may obtain a third value,which is a remainder value, obtained by dividing the second value by thenumber of slots belonging to the resource pool within the 10240 ms. Forexample, the value of S may be a zero or a positive integer. Forexample, the time domain of the SL resource may be a slot represented bythe third value. For example, the slot represented by the third valuemay be a Pt slot of a SL grant in a S-th period.

For example, the information related to the time offset may beinformation in a logical slot unit.

For example, the SL resource may be a configured grant (CG) type-1resource or a CG type-2 resource allocated by a CG. For example, basedon the SL resource being the CG type-1 resource, the information relatedto the time offset and the information related to the first period maybe received from the base station through a radio resource control (RRC)message. For example, based on the SL resource being the CG type-2resource, the information related to the first period may be receivedfrom the base station through an RRC message, and the informationrelated to the time offset may be received from the base station througha downlink control information (DCI).

Additionally, for example, the first device may transmit, to a seconddevice through a physical sidelink control channel (PSCCH), a firstsidelink control information (SCI) for scheduling a physical sidelinkshared channel (PSSCH) based on the SL resource. Additionally, forexample, the first device may transmit, to the second device through thePSSCH, a second SCI or a medium access control protocol data unit (MACPDU) based on the SL resource.

The proposed method may be applied to device(s) based on variousembodiments of the present disclosure. First, the processor 102 of thefirst device 100 may control the transceiver 106 to receive, from a basestation, information related to a time offset of a sidelink (SL)resource and information related to a first period of the SL resource.In addition, the processor 102 of the first device 100 may determine anumber of slots belonging to a resource pool within 10240 ms. Inaddition, the processor 102 of the first device 100 may obtaininformation related to a second period in a logical slot unit, from theinformation related to the first period based on the number of slotsbelonging to the resource pool. In addition, the processor 102 of thefirst device 100 may determine a time domain of the SL resource based onthe information related to the second period, the information related tothe time offset, and the number of slots belonging to the resource pool.

Based on an embodiment of the present disclosure, a first deviceconfigured to perform wireless communication may be provided. Forexample, the first device may comprise: one or more memories storinginstructions; one or more transceivers; and one or more processorsconnected to the one or more memories and the one or more transceivers.For example, the one or more processors may execute the instructions to:receive, from a base station, information related to a time offset of asidelink (SL) resource and information related to a first period of theSL resource; determine a number of slots belonging to a resource poolwithin 10240 ms; obtain information related to a second period in alogical slot unit, from the information related to the first periodbased on the number of slots belonging to the resource pool; anddetermine a time domain of the SL resource based on the informationrelated to the second period, the information related to the timeoffset, and the number of slots belonging to the resource pool.

Based on an embodiment of the present disclosure, an apparatusconfigured to control a first user equipment (UE) may be provided. Forexample, the apparatus may comprise: one or more processors; and one ormore memories operably connected to the one or more processors andstoring instructions. For example, the one or more processors mayexecute the instructions to: receive, from a base station, informationrelated to a time offset of a sidelink (SL) resource and informationrelated to a first period of the SL resource; determine a number ofslots belonging to a resource pool within 10240 ms; obtain informationrelated to a second period in a logical slot unit, from the informationrelated to the first period based on the number of slots belonging tothe resource pool; and determine a time domain of the SL resource basedon the information related to the second period, the information relatedto the time offset, and the number of slots belonging to the resourcepool.

Based on an embodiment of the present disclosure, a non-transitorycomputer-readable storage medium storing instructions may be provided.For example, the non-transitory computer-readable storage medium storinginstructions, when executed, may cause a first device to: receive, froma base station, information related to a time offset of a sidelink (SL)resource and information related to a first period of the SL resource;determine a number of slots belonging to a resource pool within 10240ms; obtain information related to a second period in a logical slotunit, from the information related to the first period based on thenumber of slots belonging to the resource pool; and determine a timedomain of the SL resource based on the information related to the secondperiod, the information related to the time offset, and the number ofslots belonging to the resource pool.

FIG. 14 shows a method for a base station to perform wirelesscommunication, based on an embodiment of the present disclosure. Theembodiment of FIG. 14 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 14, in step S1410, the base station may transmit, to adevice, information related to a time offset of a sidelink (SL) resourceand information related to a first period of the SL resource. Forexample, a number of slots belonging to a resource pool within 10240 msmay be determined by the device. For example, information related to asecond period in a logical slot unit may be obtained by the device, fromthe information related to the first period based on the number of slotsbelonging to the resource pool. For example, a time domain of the SLresource may be determined by the device based on the informationrelated to the second period, the information related to the timeoffset, and the number of slots belonging to the resource pool.

The proposed method may be applied to device(s) based on variousembodiments of the present disclosure. First, the processor 202 of thebase station 200 may control the transceiver 206 to transmit, to adevice, information related to a time offset of a sidelink (SL) resourceand information related to a first period of the SL resource. Forexample, a number of slots belonging to a resource pool within 10240 msmay be determined by the device. For example, information related to asecond period in a logical slot unit may be obtained by the device, fromthe information related to the first period based on the number of slotsbelonging to the resource pool. For example, a time domain of the SLresource may be determined by the device based on the informationrelated to the second period, the information related to the timeoffset, and the number of slots belonging to the resource pool.

Based on an embodiment of the present disclosure, a base stationconfigured to perform wireless communication may be provided. Forexample, the base station may comprise: one or more memories storinginstructions; one or more transceivers; and one or more processorsconnected to the one or more memories and the one or more transceivers.For example, the one or more processors may execute the instructions to:transmit, to a device, information related to a time offset of asidelink (SL) resource and information related to a first period of theSL resource. For example, a number of slots belonging to a resource poolwithin 10240 ms may be determined by the device. For example,information related to a second period in a logical slot unit may beobtained by the device, from the information related to the first periodbased on the number of slots belonging to the resource pool. Forexample, a time domain of the SL resource may be determined by thedevice based on the information related to the second period, theinformation related to the time offset, and the number of slotsbelonging to the resource pool.

Based on an embodiment of the present disclosure, an apparatusconfigured to control a base station may be provided. For example, theapparatus may comprise: one or more processors; and one or more memoriesoperably connected to the one or more processors and storinginstructions. For example, the one or more processors may execute theinstructions to: transmit, to a user equipment (UE), information relatedto a time offset of a sidelink (SL) resource and information related toa first period of the SL resource. For example, a number of slotsbelonging to a resource pool within 10240 ms may be determined by theUE. For example, information related to a second period in a logicalslot unit may be obtained by the UE, from the information related to thefirst period based on the number of slots belonging to the resourcepool. For example, a time domain of the SL resource may be determined bythe UE based on the information related to the second period, theinformation related to the time offset, and the number of slotsbelonging to the resource pool.

Based on an embodiment of the present disclosure, a non-transitorycomputer-readable storage medium storing instructions may be provided.For example, the non-transitory computer-readable storage medium storinginstructions, when executed, may cause a base station to: transmit, to adevice, information related to a time offset of a sidelink (SL) resourceand information related to a first period of the SL resource. Forexample, a number of slots belonging to a resource pool within 10240 msmay be determined by the device. For example, information related to asecond period in a logical slot unit may be obtained by the device, fromthe information related to the first period based on the number of slotsbelonging to the resource pool. For example, a time domain of the SLresource may be determined by the device based on the informationrelated to the second period, the information related to the timeoffset, and the number of slots belonging to the resource pool.

In the present disclosure, a method for the UE to determine CG type-1resource(s) or CG type-2 resource(s) configured by the base stationbased on SL logical slot resources belonging to the SL resource pool,and an apparatus supporting the same are proposed. According to theabove-described various embodiments, it is possible to solve a problemin which a mismatch occurs between SL resources used by the UE receivingthe information related to the CG resource(s) and SL resources allocatedto the UE by the base station. Accordingly, effects can be obtained interms of radio resource management and quality assurance of SLcommunication.

Various embodiments of the present disclosure may be combined with eachother.

Hereinafter, device(s) to which various embodiments of the presentdisclosure can be applied will be described.

The various descriptions, functions, procedures, proposals, methods,and/or operational flowcharts of the present disclosure described inthis document may be applied to, without being limited to, a variety offields requiring wireless communication/connection (e.g., 5G) betweendevices.

Hereinafter, a description will be given in more detail with referenceto the drawings. In the following drawings/description, the samereference symbols may denote the same or corresponding hardware blocks,software blocks, or functional blocks unless described otherwise.

FIG. 15 shows a communication system 1, based on an embodiment of thepresent disclosure.

Referring to FIG. 15, a communication system 1 to which variousembodiments of the present disclosure are applied includes wirelessdevices, Base Stations (BSs), and a network. Herein, the wirelessdevices represent devices performing communication using Radio AccessTechnology (RAT) (e.g., 5G New RAT (NR)) or Long-Term Evolution (LTE))and may be referred to as communication/radio/5G devices. The wirelessdevices may include, without being limited to, a robot 100 a, vehicles100 b-1 and 100 b-2, an eXtended Reality (XR) device 100 c, a hand-helddevice 100 d, a home appliance 100 e, an Internet of Things (IoT) device100 f, and an Artificial Intelligence (AI) device/server 400. Forexample, the vehicles may include a vehicle having a wirelesscommunication function, an autonomous vehicle, and a vehicle capable ofperforming communication between vehicles. Herein, the vehicles mayinclude an Unmanned Aerial Vehicle (UAV) (e.g., a drone). The XR devicemay include an Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality(MR) device and may be implemented in the form of a Head-Mounted Device(HMD), a Head-Up Display (HUD) mounted in a vehicle, a television, asmartphone, a computer, a wearable device, a home appliance device, adigital signage, a vehicle, a robot, etc. The hand-held device mayinclude a smartphone, a smartpad, a wearable device (e.g., a smartwatchor a smartglasses), and a computer (e.g., a notebook). The homeappliance may include a TV, a refrigerator, and a washing machine. TheIoT device may include a sensor and a smartmeter. For example, the BSsand the network may be implemented as wireless devices and a specificwireless device 200 a may operate as a BS/network node with respect toother wireless devices.

Here, wireless communication technology implemented in wireless devices100 a to 100 f of the present disclosure may include Narrowband Internetof Things for low-power communication in addition to LTE, NR, and 6G. Inthis case, for example, NB-IoT technology may be an example of Low PowerWide Area Network (LPWAN) technology and may be implemented as standardssuch as LTE Cat NB1, and/or LTE Cat NB2, and is not limited to the namedescribed above. Additionally or alternatively, the wirelesscommunication technology implemented in the wireless devices 100 a to100 f of the present disclosure may perform communication based on LTE-Mtechnology. In this case, as an example, the LTE-M technology may be anexample of the LPWAN and may be called by various names includingenhanced Machine Type Communication (eMTC), and the like. For example,the LTE-M technology may be implemented as at least any one of variousstandards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTEnon-Bandwidth Limited (non-BL), 5) LTE-MTC, 6) LTE Machine TypeCommunication, and/or 7) LTE M, and is not limited to the name describedabove. Additionally or alternatively, the wireless communicationtechnology implemented in the wireless devices 100 a to 100 f of thepresent disclosure may include at least one of Bluetooth, Low Power WideArea Network (LPWAN), and ZigBee considering the low-powercommunication, and is not limited to the name described above. As anexample, the ZigBee technology may generate personal area networks (PAN)related to small/low-power digital communication based on variousstandards including IEEE 802.15.4, and the like, and may be called byvarious names.

The wireless devices 100 a to 100 f may be connected to the network 300via the BSs 200. An AI technology may be applied to the wireless devices100 a to 100 f and the wireless devices 100 a to 100 f may be connectedto the AI server 400 via the network 300. The network 300 may beconfigured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g.,NR) network. Although the wireless devices 100 a to 100 f maycommunicate with each other through the BSs 200/network 300, thewireless devices 100 a to 100 f may perform direct communication (e.g.,sidelink communication) with each other without passing through theBSs/network. For example, the vehicles 100 b-1 and 100 b-2 may performdirect communication (e.g. Vehicle-to-Vehicle(V2V)/Vehicle-to-everything (V2X) communication). The IoT device (e.g.,a sensor) may perform direct communication with other IoT devices (e.g.,sensors) or other wireless devices 100 a to 100 f.

Wireless communication/connections 150 a, 150 b, or 150 c may beestablished between the wireless devices 100 a to 100 f/BS 200, or BS200/BS 200. Herein, the wireless communication/connections may beestablished through various RATs (e.g., 5G NR) such as uplink/downlinkcommunication 150 a, sidelink communication 150 b (or, D2Dcommunication), or inter BS communication (e.g. relay, Integrated AccessBackhaul (IAB)). The wireless devices and the BSs/the wireless devicesmay transmit/receive radio signals to/from each other through thewireless communication/connections 150 a and 150 b. For example, thewireless communication/connections 150 a and 150 b may transmit/receivesignals through various physical channels. To this end, at least a partof various configuration information configuring processes, varioussignal processing processes (e.g., channel encoding/decoding,modulation/demodulation, and resource mapping/demapping), and resourceallocating processes, for transmitting/receiving radio signals, may beperformed based on the various proposals of the present disclosure.

FIG. 16 shows wireless devices, based on an embodiment of the presentdisclosure.

Referring to FIG. 16, a first wireless device 100 and a second wirelessdevice 200 may transmit radio signals through a variety of RATs (e.g.,LTE and NR). Herein, {the first wireless device 100 and the secondwireless device 200} may correspond to {the wireless device 100 x andthe BS 200} and/or {the wireless device 100 x and the wireless device100 x} of FIG. 15.

The first wireless device 100 may include one or more processors 102 andone or more memories 104 and additionally further include one or moretransceivers 106 and/or one or more antennas 108. The processor(s) 102may control the memory(s) 104 and/or the transceiver(s) 106 and may beconfigured to implement the descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed in thisdocument. For example, the processor(s) 102 may process informationwithin the memory(s) 104 to generate first information/signals and thentransmit radio signals including the first information/signals throughthe transceiver(s) 106. The processor(s) 102 may receive radio signalsincluding second information/signals through the transceiver 106 andthen store information obtained by processing the secondinformation/signals in the memory(s) 104. The memory(s) 104 may beconnected to the processor(s) 102 and may store a variety of informationrelated to operations of the processor(s) 102. For example, thememory(s) 104 may store software code including commands for performinga part or the entirety of processes controlled by the processor(s) 102or for performing the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document.Herein, the processor(s) 102 and the memory(s) 104 may be a part of acommunication modem/circuit/chip designed to implement RAT (e.g., LTE orNR). The transceiver(s) 106 may be connected to the processor(s) 102 andtransmit and/or receive radio signals through one or more antennas 108.Each of the transceiver(s) 106 may include a transmitter and/or areceiver. The transceiver(s) 106 may be interchangeably used with RadioFrequency (RF) unit(s). In the present disclosure, the wireless devicemay represent a communication modem/circuit/chip.

The second wireless device 200 may include one or more processors 202and one or more memories 204 and additionally further include one ormore transceivers 206 and/or one or more antennas 208. The processor(s)202 may control the memory(s) 204 and/or the transceiver(s) 206 and maybe configured to implement the descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed in thisdocument. For example, the processor(s) 202 may process informationwithin the memory(s) 204 to generate third information/signals and thentransmit radio signals including the third information/signals throughthe transceiver(s) 206. The processor(s) 202 may receive radio signalsincluding fourth information/signals through the transceiver(s) 106 andthen store information obtained by processing the fourthinformation/signals in the memory(s) 204. The memory(s) 204 may beconnected to the processor(s) 202 and may store a variety of informationrelated to operations of the processor(s) 202. For example, thememory(s) 204 may store software code including commands for performinga part or the entirety of processes controlled by the processor(s) 202or for performing the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document.Herein, the processor(s) 202 and the memory(s) 204 may be a part of acommunication modem/circuit/chip designed to implement RAT (e.g., LTE orNR). The transceiver(s) 206 may be connected to the processor(s) 202 andtransmit and/or receive radio signals through one or more antennas 208.Each of the transceiver(s) 206 may include a transmitter and/or areceiver. The transceiver(s) 206 may be interchangeably used with RFunit(s). In the present disclosure, the wireless device may represent acommunication modem/circuit/chip.

Hereinafter, hardware elements of the wireless devices 100 and 200 willbe described more specifically. One or more protocol layers may beimplemented by, without being limited to, one or more processors 102 and202. For example, the one or more processors 102 and 202 may implementone or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP,RRC, and SDAP). The one or more processors 102 and 202 may generate oneor more Protocol Data Units (PDUs) and/or one or more Service Data Unit(SDUs) according to the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document. Theone or more processors 102 and 202 may generate messages, controlinformation, data, or information according to the descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed in this document. The one or more processors 102 and 202 maygenerate signals (e.g., baseband signals) including PDUs, SDUs,messages, control information, data, or information according to thedescriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed in this document and provide thegenerated signals to the one or more transceivers 106 and 206. The oneor more processors 102 and 202 may receive the signals (e.g., basebandsignals) from the one or more transceivers 106 and 206 and acquire thePDUs, SDUs, messages, control information, data, or informationaccording to the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document.

The one or more processors 102 and 202 may be referred to ascontrollers, microcontrollers, microprocessors, or microcomputers. Theone or more processors 102 and 202 may be implemented by hardware,firmware, software, or a combination thereof. As an example, one or moreApplication Specific Integrated Circuits (ASICs), one or more DigitalSignal Processors (DSPs), one or more Digital Signal Processing Devices(DSPDs), one or more Programmable Logic Devices (PLDs), or one or moreField Programmable Gate Arrays (FPGAs) may be included in the one ormore processors 102 and 202. The descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed in thisdocument may be implemented using firmware or software and the firmwareor software may be configured to include the modules, procedures, orfunctions. Firmware or software configured to perform the descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed in this document may be included in the one or more processors102 and 202 or stored in the one or more memories 104 and 204 so as tobe driven by the one or more processors 102 and 202. The descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed in this document may be implemented using firmware or softwarein the form of code, commands, and/or a set of commands.

The one or more memories 104 and 204 may be connected to the one or moreprocessors 102 and 202 and store various types of data, signals,messages, information, programs, code, instructions, and/or commands.The one or more memories 104 and 204 may be configured by Read-OnlyMemories (ROMs), Random Access Memories (RAMs), Electrically ErasableProgrammable Read-Only Memories (EPROMs), flash memories, hard drives,registers, cash memories, computer-readable storage media, and/orcombinations thereof. The one or more memories 104 and 204 may belocated at the interior and/or exterior of the one or more processors102 and 202. The one or more memories 104 and 204 may be connected tothe one or more processors 102 and 202 through various technologies suchas wired or wireless connection.

The one or more transceivers 106 and 206 may transmit user data, controlinformation, and/or radio signals/channels, mentioned in the methodsand/or operational flowcharts of this document, to one or more otherdevices. The one or more transceivers 106 and 206 may receive user data,control information, and/or radio signals/channels, mentioned in thedescriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed in this document, from one or moreother devices. For example, the one or more transceivers 106 and 206 maybe connected to the one or more processors 102 and 202 and transmit andreceive radio signals. For example, the one or more processors 102 and202 may perform control so that the one or more transceivers 106 and 206may transmit user data, control information, or radio signals to one ormore other devices. The one or more processors 102 and 202 may performcontrol so that the one or more transceivers 106 and 206 may receiveuser data, control information, or radio signals from one or more otherdevices. The one or more transceivers 106 and 206 may be connected tothe one or more antennas 108 and 208 and the one or more transceivers106 and 206 may be configured to transmit and receive user data, controlinformation, and/or radio signals/channels, mentioned in thedescriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed in this document, through the one ormore antennas 108 and 208. In this document, the one or more antennasmay be a plurality of physical antennas or a plurality of logicalantennas (e.g., antenna ports). The one or more transceivers 106 and 206may convert received radio signals/channels etc. from RF band signalsinto baseband signals in order to process received user data, controlinformation, radio signals/channels, etc. using the one or moreprocessors 102 and 202. The one or more transceivers 106 and 206 mayconvert the user data, control information, radio signals/channels, etc.processed using the one or more processors 102 and 202 from the baseband signals into the RF band signals. To this end, the one or moretransceivers 106 and 206 may include (analog) oscillators and/orfilters.

FIG. 17 shows a signal process circuit for a transmission signal, basedon an embodiment of the present disclosure.

Referring to FIG. 17, a signal processing circuit 1000 may includescramblers 1010, modulators 1020, a layer mapper 1030, a precoder 1040,resource mappers 1050, and signal generators 1060. An operation/functionof FIG. 17 may be performed, without being limited to, the processors102 and 202 and/or the transceivers 106 and 206 of FIG. 16. Hardwareelements of FIG. 17 may be implemented by the processors 102 and 202and/or the transceivers 106 and 206 of FIG. 16. For example, blocks 1010to 1060 may be implemented by the processors 102 and 202 of FIG. 16.Alternatively, the blocks 1010 to 1050 may be implemented by theprocessors 102 and 202 of FIG. 16 and the block 1060 may be implementedby the transceivers 106 and 206 of FIG. 16.

Codewords may be converted into radio signals via the signal processingcircuit 1000 of FIG. 17. Herein, the codewords are encoded bit sequencesof information blocks. The information blocks may include transportblocks (e.g., a UL-SCH transport block, a DL-SCH transport block). Theradio signals may be transmitted through various physical channels(e.g., a PUSCH and a PDSCH).

Specifically, the codewords may be converted into scrambled bitsequences by the scramblers 1010. Scramble sequences used for scramblingmay be generated based on an initialization value, and theinitialization value may include ID information of a wireless device.The scrambled bit sequences may be modulated to modulation symbolsequences by the modulators 1020. A modulation scheme may includepi/2-Binary Phase Shift Keying (pi/2-BPSK), m-Phase Shift Keying(m-PSK), and m-Quadrature Amplitude Modulation (m-QAM). Complexmodulation symbol sequences may be mapped to one or more transportlayers by the layer mapper 1030. Modulation symbols of each transportlayer may be mapped (precoded) to corresponding antenna port(s) by theprecoder 1040. Outputs z of the precoder 1040 may be obtained bymultiplying outputs y of the layer mapper 1030 by an N*M precodingmatrix W. Herein, N is the number of antenna ports and M is the numberof transport layers. The precoder 1040 may perform precoding afterperforming transform precoding (e.g., DFT) for complex modulationsymbols. Alternatively, the precoder 1040 may perform precoding withoutperforming transform precoding.

The resource mappers 1050 may map modulation symbols of each antennaport to time-frequency resources. The time-frequency resources mayinclude a plurality of symbols (e.g., a CP-OFDMA symbols and DFT-s-OFDMAsymbols) in the time domain and a plurality of subcarriers in thefrequency domain. The signal generators 1060 may generate radio signalsfrom the mapped modulation symbols and the generated radio signals maybe transmitted to other devices through each antenna. For this purpose,the signal generators 1060 may include Inverse Fast Fourier Transform(IFFT) modules, Cyclic Prefix (CP) inserters, Digital-to-AnalogConverters (DACs), and frequency up-converters.

Signal processing procedures for a signal received in the wirelessdevice may be configured in a reverse manner of the signal processingprocedures 1010 to 1060 of FIG. 17. For example, the wireless devices(e.g., 100 and 200 of FIG. 16) may receive radio signals from theexterior through the antenna ports/transceivers. The received radiosignals may be converted into baseband signals through signal restorers.To this end, the signal restorers may include frequency downlinkconverters, Analog-to-Digital Converters (ADCs), CP remover, and FastFourier Transform (FFT) modules. Next, the baseband signals may berestored to codewords through a resource demapping procedure, apostcoding procedure, a demodulation processor, and a descramblingprocedure. The codewords may be restored to original information blocksthrough decoding. Therefore, a signal processing circuit (notillustrated) for a reception signal may include signal restorers,resource demappers, a postcoder, demodulators, descramblers, anddecoders.

FIG. 18 shows another example of a wireless device, based on anembodiment of the present disclosure. The wireless device may beimplemented in various forms according to a use-case/service (refer toFIG. 15).

Referring to FIG. 18, wireless devices 100 and 200 may correspond to thewireless devices 100 and 200 of FIG. 16 and may be configured by variouselements, components, units/portions, and/or modules. For example, eachof the wireless devices 100 and 200 may include a communication unit110, a control unit 120, a memory unit 130, and additional components140. The communication unit may include a communication circuit 112 andtransceiver(s) 114. For example, the communication circuit 112 mayinclude the one or more processors 102 and 202 and/or the one or morememories 104 and 204 of FIG. 16. For example, the transceiver(s) 114 mayinclude the one or more transceivers 106 and 206 and/or the one or moreantennas 108 and 208 of FIG. 16. The control unit 120 is electricallyconnected to the communication unit 110, the memory 130, and theadditional components 140 and controls overall operation of the wirelessdevices. For example, the control unit 120 may control anelectric/mechanical operation of the wireless device based onprograms/code/commands/information stored in the memory unit 130. Thecontrol unit 120 may transmit the information stored in the memory unit130 to the exterior (e.g., other communication devices) via thecommunication unit 110 through a wireless/wired interface or store, inthe memory unit 130, information received through the wireless/wiredinterface from the exterior (e.g., other communication devices) via thecommunication unit 110.

The additional components 140 may be variously configured according totypes of wireless devices. For example, the additional components 140may include at least one of a power unit/battery, input/output (I/O)unit, a driving unit, and a computing unit. The wireless device may beimplemented in the form of, without being limited to, the robot (100 aof FIG. 15), the vehicles (100 b-1 and 100 b-2 of FIG. 15), the XRdevice (100 c of FIG. 15), the hand-held device (100 d of FIG. 15), thehome appliance (100 e of FIG. 15), the IoT device (100 f of FIG. 15), adigital broadcast terminal, a hologram device, a public safety device,an MTC device, a medicine device, a fintech device (or a financedevice), a security device, a climate/environment device, the AIserver/device (400 of FIG. 15), the BSs (200 of FIG. 15), a networknode, etc. The wireless device may be used in a mobile or fixed placeaccording to a use-example/service.

In FIG. 18, the entirety of the various elements, components,units/portions, and/or modules in the wireless devices 100 and 200 maybe connected to each other through a wired interface or at least a partthereof may be wirelessly connected through the communication unit 110.For example, in each of the wireless devices 100 and 200, the controlunit 120 and the communication unit 110 may be connected by wire and thecontrol unit 120 and first units (e.g., 130 and 140) may be wirelesslyconnected through the communication unit 110. Each element, component,unit/portion, and/or module within the wireless devices 100 and 200 mayfurther include one or more elements. For example, the control unit 120may be configured by a set of one or more processors. As an example, thecontrol unit 120 may be configured by a set of a communication controlprocessor, an application processor, an Electronic Control Unit (ECU), agraphical processing unit, and a memory control processor. As anotherexample, the memory 130 may be configured by a Random Access Memory(RAM), a Dynamic RAM (DRAM), a Read Only Memory (ROM)), a flash memory,a volatile memory, a non-volatile memory, and/or a combination thereof.

Hereinafter, an example of implementing FIG. 18 will be described indetail with reference to the drawings.

FIG. 19 shows a hand-held device, based on an embodiment of the presentdisclosure. The hand-held device may include a smartphone, a smartpad, awearable device (e.g., a smartwatch or a smartglasses), or a portablecomputer (e.g., a notebook). The hand-held device may be referred to asa mobile station (MS), a user terminal (UT), a Mobile Subscriber Station(MSS), a Subscriber Station (SS), an Advanced Mobile Station (AMS), or aWireless Terminal (WT).

Referring to FIG. 19, a hand-held device 100 may include an antenna unit108, a communication unit 110, a control unit 120, a memory unit 130, apower supply unit 140 a, an interface unit 140 b, and an I/O unit 140 c.The antenna unit 108 may be configured as a part of the communicationunit 110. Blocks 110 to 130/140 a to 140 c correspond to the blocks 110to 130/140 of FIG. 18, respectively.

The communication unit 110 may transmit and receive signals (e.g., dataand control signals) to and from other wireless devices or BSs. Thecontrol unit 120 may perform various operations by controllingconstituent elements of the hand-held device 100. The control unit 120may include an Application Processor (AP). The memory unit 130 may storedata/parameters/programs/code/commands needed to drive the hand-helddevice 100. The memory unit 130 may store input/output data/information.The power supply unit 140 a may supply power to the hand-held device 100and include a wired/wireless charging circuit, a battery, etc. Theinterface unit 140 b may support connection of the hand-held device 100to other external devices. The interface unit 140 b may include variousports (e.g., an audio I/O port and a video I/O port) for connection withexternal devices. The I/O unit 140 c may input or output videoinformation/signals, audio information/signals, data, and/or informationinput by a user. The I/O unit 140 c may include a camera, a microphone,a user input unit, a display unit 140 d, a speaker, and/or a hapticmodule.

As an example, in the case of data communication, the I/O unit 140 c mayacquire information/signals (e.g., touch, text, voice, images, or video)input by a user and the acquired information/signals may be stored inthe memory unit 130. The communication unit 110 may convert theinformation/signals stored in the memory into radio signals and transmitthe converted radio signals to other wireless devices directly or to aBS. The communication unit 110 may receive radio signals from otherwireless devices or the BS and then restore the received radio signalsinto original information/signals. The restored information/signals maybe stored in the memory unit 130 and may be output as various types(e.g., text, voice, images, video, or haptic) through the I/O unit 140c.

FIG. 20 shows a vehicle or an autonomous vehicle, based on an embodimentof the present disclosure. The vehicle or autonomous vehicle may beimplemented by a mobile robot, a car, a train, a manned/unmanned AerialVehicle (AV), a ship, etc.

Referring to FIG. 20, a vehicle or autonomous vehicle 100 may include anantenna unit 108, a communication unit 110, a control unit 120, adriving unit 140 a, a power supply unit 140 b, a sensor unit 140 c, andan autonomous driving unit 140 d. The antenna unit 108 may be configuredas a part of the communication unit 110. The blocks 110/130/140 a to 140d correspond to the blocks 110/130/140 of FIG. 18, respectively.

The communication unit 110 may transmit and receive signals (e.g., dataand control signals) to and from external devices such as othervehicles, BSs (e.g., gNBs and road side units), and servers. The controlunit 120 may perform various operations by controlling elements of thevehicle or the autonomous vehicle 100. The control unit 120 may includean Electronic Control Unit (ECU). The driving unit 140 a may cause thevehicle or the autonomous vehicle 100 to drive on a road. The drivingunit 140 a may include an engine, a motor, a powertrain, a wheel, abrake, a steering device, etc. The power supply unit 140 b may supplypower to the vehicle or the autonomous vehicle 100 and include awired/wireless charging circuit, a battery, etc. The sensor unit 140 cmay acquire a vehicle state, ambient environment information, userinformation, etc. The sensor unit 140 c may include an InertialMeasurement Unit (IMU) sensor, a collision sensor, a wheel sensor, aspeed sensor, a slope sensor, a weight sensor, a heading sensor, aposition module, a vehicle forward/backward sensor, a battery sensor, afuel sensor, a tire sensor, a steering sensor, a temperature sensor, ahumidity sensor, an ultrasonic sensor, an illumination sensor, a pedalposition sensor, etc. The autonomous driving unit 140 d may implementtechnology for maintaining a lane on which a vehicle is driving,technology for automatically adjusting speed, such as adaptive cruisecontrol, technology for autonomously driving along a determined path,technology for driving by automatically setting a path if a destinationis set, and the like.

For example, the communication unit 110 may receive map data, trafficinformation data, etc. from an external server. The autonomous drivingunit 140 d may generate an autonomous driving path and a driving planfrom the obtained data. The control unit 120 may control the drivingunit 140 a such that the vehicle or the autonomous vehicle 100 may movealong the autonomous driving path according to the driving plan (e.g.,speed/direction control). In the middle of autonomous driving, thecommunication unit 110 may aperiodically/periodically acquire recenttraffic information data from the external server and acquiresurrounding traffic information data from neighboring vehicles. In themiddle of autonomous driving, the sensor unit 140 c may obtain a vehiclestate and/or surrounding environment information. The autonomous drivingunit 140 d may update the autonomous driving path and the driving planbased on the newly obtained data/information. The communication unit 110may transfer information about a vehicle position, the autonomousdriving path, and/or the driving plan to the external server. Theexternal server may predict traffic information data using AItechnology, etc., based on the information collected from vehicles orautonomous vehicles and provide the predicted traffic information datato the vehicles or the autonomous vehicles.

Claims in the present description can be combined in a various way. Forinstance, technical features in method claims of the present descriptioncan be combined to be implemented or performed in an apparatus, andtechnical features in apparatus claims can be combined to be implementedor performed in a method. Further, technical features in method claim(s)and apparatus claim(s) can be combined to be implemented or performed inan apparatus. Further, technical features in method claim(s) andapparatus claim(s) can be combined to be implemented or performed in amethod.

What is claimed is:
 1. A method for performing wireless communication bya first device, the method comprising: receiving, from a base station,information related to a time offset of a sidelink (SL) resource andinformation related to a first period of the SL resource; determining anumber of slots belonging to a resource pool within 10240 ms; obtaininginformation related to a second period in a logical slot unit, from theinformation related to the first period based on the number of slotsbelonging to the resource pool; and determining a time domain of the SLresource based on the information related to the second period, theinformation related to the time offset, and the number of slotsbelonging to the resource pool.
 2. The method of claim 1, furthercomprising: obtaining a remainder value by dividing a value obtainedbased on the information related to the second period and theinformation related to the time offset by the number of slots belongingto the resource pool within the 10240 ms, wherein the time domain of theSL resource is determined based on the remainder value.
 3. The method ofclaim 2, wherein the time domain of the SL resource is a slotrepresented by the remainder value.
 4. The method of claim 3, whereinthe slot represented by the remainder value is a 1^(st) slot of a SLgrant in a period.
 5. The method of claim 1, wherein the number of slotsbelonging to the resource pool within the 10240 ms is determined byexcluding a number of slots for sidelink-synchronization signal block(S-SSB) and a number of reserved slots from a number of slots availablefor SL transmission belonging to the 10240 ms.
 6. The method of claim 5,wherein the number of slots belonging to the resource pool within the10240 ms is determined based on a number of bits set to 1 among bits ofa bitmap related to the resource pool.
 7. The method of claim 1, furthercomprising: obtaining a first value by multiplying the informationrelated to the second period by a value of S; obtaining a second valueby adding the information related to the time offset to the first value;and obtaining a third value, which is a remainder value, obtained bydividing the second value by the number of slots belonging to theresource pool within the 10240 ms, wherein the value of S is a zero or apositive integer.
 8. The method of claim 7, wherein the time domain ofthe SL resource is a slot represented by the third value.
 9. The methodof claim 8, wherein the slot represented by the third value is a 1^(st)slot of a SL grant in a S-th period.
 10. The method of claim 1, whereinthe information related to the time offset is information in a logicalslot unit.
 11. The method of claim 1, wherein the SL resource is aconfigured grant (CG) type-1 resource or a CG type-2 resource allocatedby a CG.
 12. The method of claim 11, wherein, based on the SL resourcebeing the CG type-1 resource, the information related to the time offsetand the information related to the first period are received from thebase station through a radio resource control (RRC) message, andwherein, based on the SL resource being the CG type-2 resource, theinformation related to the first period is received from the basestation through an RRC message, and the information related to the timeoffset is received from the base station through a downlink controlinformation (DCI).
 13. The method of claim 1, further comprising:transmitting, to a second device through a physical sidelink controlchannel (PSCCH), a first sidelink control information (SCI) forscheduling a physical sidelink shared channel (PSSCH) based on the SLresource; and transmitting, to the second device through the PSSCH, asecond SCI or a medium access control protocol data unit (MAC PDU) basedon the SL resource.
 14. A first device configured to perform wirelesscommunication, the first device comprising: one or more memories storinginstructions; one or more transceivers; and one or more processorsconnected to the one or more memories and the one or more transceivers,wherein the one or more processors execute the instructions to: receive,from a base station, information related to a time offset of a sidelink(SL) resource and information related to a first period of the SLresource; determine a number of slots belonging to a resource poolwithin 10240 ms; obtain information related to a second period in alogical slot unit, from the information related to the first periodbased on the number of slots belonging to the resource pool; anddetermine a time domain of the SL resource based on the informationrelated to the second period, the information related to the timeoffset, and the number of slots belonging to the resource pool.
 15. Anapparatus configured to control a first user equipment (UE), theapparatus comprising: one or more processors; and one or more memoriesoperably connected to the one or more processors and storinginstructions, wherein the one or more processors execute theinstructions to: receive, from a base station, information related to atime offset of a sidelink (SL) resource and information related to afirst period of the SL resource; determine a number of slots belongingto a resource pool within 10240 ms; obtain information related to asecond period in a logical slot unit, from the information related tothe first period based on the number of slots belonging to the resourcepool; and determine a time domain of the SL resource based on theinformation related to the second period, the information related to thetime offset, and the number of slots belonging to the resource pool.